35MM BAYONET MOUNT LENSES



3.5cm f/3.5 Summaron

There were several variants of Leica 3.5cm f/3.5 Summaron lens for Leica M cameras: 

  • For Leica M3 and without optical viewing unit ("goggles")
  • For Leica M3 and with removable optical viewing unit ("goggles")
  • For Leica M2 and without optical viewing unit ("goggles")


For Leica M3 and without optical viewing unit ("goggles")

Prototypes

Among the known prototypes were:

  • 0000125, dated 1950s, that was auctioned off at the 47th Leitz Photographica Auction533. It was described as "This lens shows a distinctly different barrel construction compared to the standard production model; the light baffle is larger, and the engravings are executed in a different style."533.


Serial Production

First came the version without optical viewing unit ("goggles"), 11105/SOONC-M, introduced in 1954, specifically designed for Leica M3542. This early version required the use of SBLOO/12010 brightline viewfinder for composing on Leica M3542 which, in turn, required the removal of the coupled Leicameter-M if it was mounted on the camera194. This version used E-39 screw-in filters542. SOONC-M could not be used with the optical viewing unit ("goggles") that were made available later with SOONC-MW457.

Among the lenses of this type were: 1107353 (pre-series), 1107972 (pre-series), 1108321 (pre-series, with serial number in 2 places), 1148489, 1148775, 1149743, 1176097, 1176510, 1177939, 1178794, 1178858, 1179413, 1180848, 1274915, 1288737, 1289625.


For Leica M3 and with removable optical viewing unit ("goggles")

Prototypes

Among the known prototypes were:

  • 0000033 with optical viewing unit ("goggles") was known and belonged to a prominent Hong Kongese collection in September of 2026.
  • 0000116 with optical viewing unit ("goggles"), dated 1953, was auctioned off at the 23rd WestLicht Photographica Auction401. It was described as "slightly different engraving style, black painted goggles with condenser logo...- matching for 0-series M3!"401.
  • 0000117 with optical viewing unit ("goggles"), dated 1953, was auctioned off at the 23rd WestLicht Photographica Auction401. It was described as "engraving is different to later lenses, black painted goggles with condenser logo (caps), this particular lens is illustrated in Paul-Henry van Hasbroeck 'A History Illustrating every Model and Accessory' on p.157"401. This lens belong to Paul-Henry van Hasbroeck at some point401. 
  • 0000118 was illustrated in Paul-Henry van Hasbroeck "Leica in Colour" book401.
  • 0000119 was illustrated in Paul-Henry van Hasbroeck "Leica in Colour" book401.
  • 842682. See 1148420 below.
  • 1062626, dated 1954, that was auctioned off at the 8th Wetzlar Camera Auctions597. It was described as "An extremely rare experimental version of the Summaron 3,5 cm for the Leica M3. It features an aluminium mount and a special focusing wheel instead of a focusing lever. Also unusual is the permanently attached viewfinder attachment for use with the Leica M3. The standard production version of the Summaron f/3.5 for the M3 generally had a detachable viewfinder attachment. The entry in the Leitz delivery ledger for this lens reads factory-internal (lens assembly department)."597.
  • 3 lenses of the similar kind were: 
    • 1148420, dated 1954, with one unique detachable eyepiece attachment400. This prototype was auctioned off at the 24th WestLicht Photographica Auction and was described as "extremely rare prototype Summaron for (0-series) M3, with unique detachable eyepiece attachment for 35mm..."400. The 1148420 was part of prominent Hong Kongese collection in 2026. 
    • Another lens, an unnumbered one was illustrated on page 323 of Mr. Lars Netopil's "Prototyp Leica" book - that lens too was part of prominent Hong Kongese collection in November of 2026. appeared to be missing the attaching piece of unique detachable eyepiece attachment. Only a small tab with "11 16 22" aperture values was present. 
    • Similarly to the unnumbered one from Mr. Lars Netopil's "Prototyp Leica" book was number 842682, dated circa 1951, that was auctioned off at the 6th Westlicht Photographica Auction418. It was described as "a previously unknown prototype of a wide angle lens for the M3 pre-production series, in the Leitz sales book the column for this serial number is empty, which means the lens was used within the company (like most of the prototypes)"418. In the auction catalog, similarly to the lens in Mr. Lars Netopil's "Prototyp Leica" book, 842682 appeared to be missing the attaching piece of unique detachable eyepiece attachment. Only a small tab with "11 16 22" aperture values was present.


Serial Production

Second came the version with removable optical viewing unit ("goggles"), 11107/SOONC-MW, introduced in 1956 at Photokina (September 29-October 7, 1956), specifically designed for Leica M3542. This version, also referred to as 3.5cm f/3.5 Summaron "RF", eliminated the need for the SBLOO/12010 brightline viewfinder, as it had a removable optical viewing unit ("goggles")542. When mounted on the camera, the optical viewing unit ("goggles") minimized the larger 50mm frame to match the 35mm field of view194. As a result, users could benefit from an integral and easy-to-use 35mm frame without needing to remove the Leicameter-M or carry the comparatively large SBLOO/12010 brightline viewfinder separately194. 

Interestingly, you can easily determine the framelines for the 90mm focal length when using SOONC-MW on the Leica M3, by simply moving the field selector lever to the left465. This action brings the 135mm frameline into view, but due to magnification, it effectively appears as the 90mm framelines465.

This version used E-39 screw-in filters542.

Interestingly, removability of the optical viewing unit ("goggles") allowed for separate storage of the unit, likely in the "half moon" leather carrying case (catalog number 14552, code-named ECOOG) for the lens, or in another fashion194. Some users attempted to use the lens on their M cameras without the optical viewing unit ("goggles"), only to discover that the lens would not focus properly without the it in place194. Additionally, removing the optical viewing unit ("goggles") would prevent activation of the 35mm frame in the Leica M2 viewfinder, contrary to users' expectations194. Lens number 1303125 was used in promotional materials and illustrated in Leica Fotografie International (5/1956).

The early 35mm f/3.5 Summaron lenses had smooth black painted optical viewing unit ("goggles"), which were eventually changed to the more durable and familiar black crinkle finish used on all rangefinder lenses thereafter194. The author of this website came across lenses with black painted optical viewing unit ("goggles") in batches 1360XXX and 1361XXX manufactured in 1956.

Among the lenses of this type were: 

  • 1360077, dated 1956 (with black painted optical viewing unit ("goggles"))
  • 1361583, dated 1956 (with black painted optical viewing unit ("goggles"))
  • 1361882, dated 1956 (with black painted optical viewing unit ("goggles"))
  • 1436239, dated 1956
  • 1485849, dated 1957
  • 1556985, dated 1958 (for the German Army, engraved "Bundeseigentum 12-124-2911")
  • 1595665, dated 1958
  • 1613795, dated 1958 (for the German Army, engraved "Bundeseigentum 12-124-2911")


For Leica M2 and without optical viewing unit ("goggles")

Third came the version without optical viewing unit ("goggles"), 11305/SOONC-MT542, introduced in Photokina466 1958, specifically designed for Leica M2542. This version, when inserted, activated the 35mm frame lines of Leica M2542. This version used E-39 screw-in filters542. The first serial number of this variant was presumed to be 1435001361. One known example was dated 1958 and numbered 1565918. 

This version was last catalogued in 1960542.

________

Lens Hoods

The lens hoods were ITDOO/12570, IROOA/12571 and 12585542.


Closing remarks

Nearly 120,000 units of this lens were sold361. Although a six-element design may seem excessive for this specification, it’s important to consider that glass research was just beginning at the Leitz glass lab361. 


A vintage camera lens with focus and aperture rings, featuring white and black markings, placed on a white surface.

35mm f/2.8 Summaron

The 35mm f/2.8 Summaron lens was introduced at the Photokina 1958466. At the introduction, both screw mount and bayonet mount lenses were available361.

The first series was produced in Wetzlar, while later series were made both there and in Midland361. This Summaron model is closely related to its predecessor in design but provides a slight increase in performance, achieving just over a half stop improvement361. This enhancement is attributed to the use of new glass treated with lanthanum361.

The lens used E-39 filters542. 

The lens hoods for this lens were IROOA/12571 and 12585542.


There were 3 versions of Leica 35mm f/2.8 Summaron lens with bayonet mount cameras were:

  • For Leica M2 and without optical viewing unit ("goggles")
  • For Leica M3 and with optical viewing unit ("goggles")
  • For Leica MD and Leica MDa, and without optical viewing unit ("goggles")


For Leica M2 and without optical viewing unit ("goggles")

Prototypes

Among the known prototypes were:

  • 0000206, dated late 1957, had B638 optical formula426.
  • 0000207, dated late 1957, had B638 optical formula426.
  • 0000208, dated late 1957, had B638 optical formula426. This lens was auctioned off at the 3rd Wetzlar Camera Auctions and was described as "At the end of 1957, three experimental lenses to the faster 35 mm Summaron were produced with numbers 0000206, 207 and 208 on basis of formula B638. Silver finished name ring and unusually early designations "Ernst Leitz GmbH Wetzlar" and "3,5 cm". The lens mount with "LENS MADE IN GERMANY" engraving."426. The same lens was later auctioned off at the 45th Leitz Photographica Auction. 
  • 0000238 was illustrated on page 229 of James L. Lager's "Leica: An Illustrated History - Volume 2 - Lenses - Signed Deluxe Limited Edition" book542.
  • 0000249 without optical viewing unit ("goggles") was auctioned off at the 48th Leitz Photographica Auction on June 13, 2026585. It was described as "A very remarkable prototype Summaron 2.8/35mm from a small batch of 10 experimental lenses made in 1958. The focusing ring is equipped with click stops at 1.5m and 3m for snapshot-style shooting — a feature not present on any production Leica M lenses. The barrel also shows an unusual chrome plating"585.
  • 0000557, dated circa 1962, was among a small batch of 3 prototype lenses (order number 603/151)396. 
  • 0000558, dated circa 1962, with B687 optical formula and in a special focusing mount, was among a small batch of 3 prototype lenses (order number 603/151)396. It was auctioned off at the 27th Westlicht Photographica Auction396.
  • 0000559, dated circa 1962, was among a small batch of 3 prototype lenses (order number 603/151)396. 
  • 1181445, dated 1955, was among six specimens that were produced long before the introduction of the production version at the Photokina 1958428.
  • 1181446, dated 1955, was among six specimens that were produced long before the introduction of the production version at the Photokina 1958428.
  • 1181447, dated 1955, was among six specimens that were produced long before the introduction of the production version at the Photokina 1958428.
  • 1181448, dated 1955, was among six specimens that were produced long before the introduction of the production version at the Photokina 1958428.
  • 1181449, dated 1955, was among six specimens that were produced long before the introduction of the production version at the Photokina 1958428.
  • 1181450, dated 1955, was auctioned off at the 1st Wetzlar Camera Auctions and was described as "Very rare early prototype of a 35 mm Leitz Summaron with maximum aperture f/2.8. Lens mount similar to the early Summaron f/3.5 for M3 (minimum focusing distance 1 m). It was the desire i.a. by Alfred Eisenstaedt, to have a 35 mm wide-angle lens with a higher speed. Already in 1955, therefore, initially six specimens of Summaron f/2.8 lenses with serial numbers 1181445 - 1181450 were produced. The lens offered here was delivered to New York on 12th of July 1955..."428.
  • 1234567 was used in promotional materials and illustrated in Leica Fotografie International (5/1958). Same or very similar lens was auctioned off at the 5th Wetzlar Camera Auctions and was described as "Very rare experimental lens of a 35 mm Summaron for the Leica M2 with maximum aperture of f/2.8 and A42 front mount, fitting E39 screw-in filters."424.  


Serial Production 

This version came without optical viewing unit ("goggles")361. This version was originally introduced for use with Leica M2466. It was code-named SIMOO-M (later SIMOM) and had catalogue number 11306542. The minimum distance was 100cm and the weight was 210 grams361. The filter size was E39 and the angle of view was 63 degrees361. There were 6 elements in 4 groups361. Some known examples included: 1615470, 1615674, 1678832, 1679543, 1696327, 1810311 (engraved "Bundeseigentum 12-133-5667"), 1810315 (engraved "Bundeseigentum 12-133-5667"), 1810317 (engraved "Bundeseigentum 12-133-5667"), 1814735, 1815350, 1923963, 2049692, 2049693, 2080586, 2081008, 2102868, 2152839, 2309827, 2310954, 2311323, 2311562, 2311571.

Among the lenses of the first production year, there were some made in the lightweight aluminium mount424. Some of the known ones were:

  • 1627066, dated 1959, that was auctioned off at the 41st Leitz Photographica Auction382. It was described as "an interesting, early Summaron 35mm, finished in lightweight aluminium instead of the standard chromed brass - the lens weighs only 134 grams vs 182 grams for the later models, the lens is in beautiful, near-mint condition, with very good optics, it is also one of the earliest examples of this lens we have seen"382. 
  • 1627521, dated 1958, that was auctioned off at the 5th Wetzlar Camera Auctions424.
  • 1627614, dated 1959, that was auctioned off at the 40th Leitz Photographica Auction383. It was described as "an interesting, early Summaron 35mm, finished in lightweight aluminium instead of the standard chromed brass - the lens weighs only 134 grams vs 182 grams for the later models, moreover, Leica Archives doesn't show any delivery data for the lenses from the batch 1627601-1627625, suggesting that these lenses might have been samples for internal use..."383.
  • 1629712, dated 1958, that was auctioned off at the 43rd Leitz Photographica Auction.


Some lenses were finished in black (likely for special order) and among them were:

  • 1782060, dated 1961, finished in black chrome378. This lens was described as "An extremely rare Summaron in black chrome finish. The lens, delivered to Brand, Sweden on 21.09.1961, was most probably made by Leitz for a special order from a customer. Another black Summaron (with goggles for use on an M3) can be seen in Lager II 'Lenses' on page 234."378.
  • 2080569, dated 1965, finished in black paint403. This lens was described as "extremely rare black painted Summaron for M2 in good condition, chrome infinity lock button, scratches on rear and front lens elements, black painted front cap, keeper - expertise by Paul-Henry van Hasbroeck"403.

 

For Leica M3 and with optical viewing unit ("goggles")

Prototypes

Among the known prototypes were:

  • 0000312, dated circa 1958, that was auctioned off at the 39th Leitz Photographica Auction384. It was described as "an interesting prototype of an M-mount f:2.8 lens, with a large 50mm front element, perfectly round aperture opening with 15 blades diaphragm, hand-engraved on the barrel with prototype serial number 0000312..."384.


Serial Production

This version came with optical viewing unit ("goggles")361. This version was originally introduced for use with Leica M3466. It was also known as the "RF" model542. It was code-named SIMOO-MW (later SIMWO) and had catalog number 11106542. The minimum distance was minimum distance was 65cm and the weight was 310 grams361. The filter size was E39 and the angle of view was 63 degrees361. There were 6 elements in 4 groups361.

Among some of the examples were: 1627406, 1662611, 1664205, 1665237, 1679141 (for German Army, engraved: "Bundeseigentum 12-130-0901"), 1694818, 1696272, 1732528 (for German Army, engraved: "Bundeseigentum 12-130-0901"), 1755793, 1782794, 1783636, 1783729, 1810201, 1923480, 2006623, 2050512 (for German Army, engraved: "6760-12-130-0901"), 2050523 (for German Army, engraved: "6760-12-130-0901"), 2050529 (for German Army, engraved: "6760-12-130-0901") , 2050531 (for German Army, engraved: "6760-12-130-0901"), 2050538 (for German Army, engraved: "6760-12-130-0901"), 2082133, 2101523, 2101936.


Some lenses were finished in black (likely for special order) and among them were:

  • 1808892, dated circa 1961, that was described as "A very rare Summaron 11106 in black finish, with matching black paint goggles for use on a Leica M3. In very fine condition, with good optics. The lens was produced around 1961, but the delivery records show a blank entry for this serial number, suggesting it may have been made as an internal sample."533. 
  • 2312423, dated circa 1968, that was described as "extremely rare Summaron for M3 in black painted and black anodised finish, chrome infinity lock knob, with perfect lenses, cap, maker's box"411.


For Leica MD and Leica MDa and without optical viewing unit ("goggles")

Another version had a fixed focus and was specifically made for the postal services for the Leica MD and Leica MDa Post cameras361.

Among the known lenses were:

  • 1931401, attached to Leica MD Post number 1067927
  • 1931415, attached to Leica MD Post number 1067983
  • 1931445, attached to Leica MD Post number 1067972
  • 1931497, attached to Leica MD Post number 1067945
  • 2153502, attached to Leica MD Post number 1164894
  • 2310898, attached to Leica MDa Post number 1273930
  • 2311446, attached to Leica MDa Post number 1273970
  • 2311946, attached to Leica MDa Post number 1293981
  • 2311949, attached to Leica MDa Post number 1293991
  • 2312060, attached to Leica MDa Post number 1293860


Closing Remarks

The bayonet version of 35mm f/2.8 Summaron was in catalogue from 1958 till 1974361. According to a different source, the SIMOO-MW was last catalogued in 1973542.

Unfortunately, the Summaron was overshadowed by the introduction of the new Summicron 2/35mm in the same year361. Nevertheless, the Summaron remained a very enjoyable lens to use, especially with digital M cameras, due to its compact design and strong performance361. 

Helmut Lagler reported that overall, there were 266500 screw mount and bayonet mount lenses of this kind produced between 1958 and 1974, with serial numbers ranging from 1615001 through 2312500439 (or 2312750361).


Vintage camera with a large lens and a viewfinder on top, next to a small cylindrical container.
A camera lens with focus distance markings in feet and meters, placed on a white background with a gray lens cap beside it.

35MM F/2 SUMMICRON-M (VERSION 1)

Leitz introduced the first version of 35mm f/2 Summicron at Photokina 1958542. 

The 35mm f/2 Summicron was particularly well-suited for available light photography in both monochrome and color542. Manufactured by both Leitz Canada and Leitz Wetzlar, it was sometimes found with a special factory-fitted screw-to-bayonet adapter, which was secured by a tiny screw542. Removing the adapter revealed that this type of bayonet-mount 35mm f/2 Summicron was actually constructed on a screw-mount 35mm f/2 Summicron SAWOO (11008) chassis542.

Lens hoods 12571 and 12585 were compatible with the eight-element lens, while the divisible hood 12504 was provided for the later six-element design542. 

This eight-element lens was released in several models542:

  • chrome finish 11108 (SAWOO-MW, later SAMWO) "RF" lens with optical viewing unit ("goggles") for the Leica M3542. Cataloged by Leitz Wetzlar as late as 1973542 Lens number 1630502 was used in promotional materials and illustrated in Leica Fotografie International (3/1959). The following prototypes were known:
    • A prototype number 0000225 was illustrated in Mr. Lars Netopil's "Museum Leica" book in 2018596.
    • A prototype number 0000265 dated 1958417. 
  • chrome finish 11308 (SAWOO-M) without optical viewing unit ("goggles") for the Leica M2 or Leica M1542. A special chrome finish lens, made in Wetzlar of aluminum and numbered 0000221, was illustrated in Mr. Lars Netopil's "Rare Leica" book in 2014594. A prototype of this variant in chrome finish number 0000226 and dated 1958, featured MADE IN CANADA engraving and did not have optical viewing unit ("goggles")409. 000228 (with three zeros) was part of a prominent Hong Kongese collection in November 2026. 000229 (with three zeros) was used in promotional materials and illustrated in Leica Fotografie International (5/1958). Another prototype of similar type (number 0000752) was part of a private collection in Hong Kong in 2026. Lens number 1780335 was used in promotional materials and illustrated in Leica Fotografie International (3/1967). 
  • black-finish 11104 "RF" lens with optical viewing unit ("goggles") for the Leica M3542. Catalogued as early as 1961542. There were 6 different variants:
    • black finish, engraved with "Germany", black finished outer collar of the bayonet mount ring, brass bayonet flange (brass mount), with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1631603, 1631613, 1631617, 1631642, 1631648
    • black finish, engraved with "Canada", black finished outer collar of the bayonet mount ring, brass bayonet flange (brass mount), with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1657430, 1743582, 1744345
    • black finish, engraved with "Canada", black finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1745174, 1745457
    • black finish, engraved with "Germany", black finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1631902, 1631910, 1631912, 1631915, 1631918, 1631929, 1631931, 1631936, 1631950, 1971512, 1971513, 1971517, 1971523, 1997204, 1997225, 1997651, 2099869
    • black finish, engraved with "Germany", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1631921
    • black finish, engraved with "Germany", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with silver chrome non-brass infinity lock, meter scale in white and feet scale in red - Examples included: 1998510
  • black-finish 11307 lens without optical viewing unit ("goggles") for the Leica M2 or Leica M1542. Catalogued as early as 1961542. Early versions had a screw that held bayonet mount flange and red letters on the distance scale542. Late versions had yellow letters on the distance scale542. There were 8 different variants:
    • black finish, engraved with "Germany", black finished outer collar of the bayonet mount ring, brass bayonet flange (brass mount), with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1632071, 1632080, 1852199
    • black finish, engraved with "Canada", black finished outer collar of the bayonet mount ring, brass bayonet flange (brass mount), with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1654913, 1654936, 1655510
    • black finish, engraved with "Germany", black paint finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1852048, 1852071, 1852079, 1852185, 1929541, 1929686, 1929692, 1929700, 1971536, 1971538, 1997690, 1997694
    • black finish, engraved with "Germany", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1632059, 1632072, 1852134, 1998233, 1998608, 1998609, 1998619, 1998647, 1998659, 2099887, 2134834
    • black finish, engraved with "Canada", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with brass infinity lock, meter scale in white and feet scale in red - Examples included: 1657120, 1657125, 1657172, 1744329
    • black finish, engraved with "Canada", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with silver chrome non-brass infinity lock, meter scale in white and feet scale in yellow - Examples included: 1744735, 2103865, 2313478
    • black finish, engraved with "Canada", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with silver chrome non-brass infinity lock, meter scale in white and feet scale in red - Examples included: 1656193, 1743790, 1743978, 1744612, 1745275, 1745675, 1746306, 1746308, 1746314, 2167794
    • black finish, engraved with "Germany", silver chrome finished outer collar of the bayonet mount ring, silver chrome non-brass bayonet flange, with silver chrome non-brass infinity lock, meter scale in white and feet scale in yellow - Examples included: 1998664, 2196453, 2196494, 2274287, 2274632, 2275562, 2275755, 2313468, 2313495, 2313496, 2313826
A vintage camera lens with multiple adjustment rings for focus, aperture, and distance measurements.
Close-up of a vintage camera with a black body, silver lens, and various dials, set against a white background.
Close-up of a camera lens with focus and aperture rings, placed on a white background with a lens cap nearby.
Camera lens with focus ring, made in Canada, isolated on white background.
A vintage camera lens with markings for meters and feet, labeled 'YASHICA' and 'CANADA.'
A vintage film camera with a large lens, black textured body, and a small viewfinder on the right, placed on a white background.


35mm f/1.4 Summilux-M - Variation 1  'Steel Rim'

According to "徕卡Summilux 35 1.4 钢嘴/圣光介绍 （增订版）", the calculation of the lens was completed in 1958. On August 30, 1958, Ernst Leitz Wetzlar applied for a patent in the United States. This was followed by an application from Ernst Leitz Canada Ltd. in August 1959 for corresponding patents in France, the United States, and Switzerland.


Prototypes referred to as "Campolux"

There were several known examples of Campolux prototypes:

  • The author of this website saw one example at the Leitz Museum in Wetzlar in May of 2025. This lens was engraved with "LEITZ CANADA 1234567 CAMPOLUX 1:1.4/35". This lens didn't have optical viewing unit attached to it. It was illustrated in Mr. Lars Netopil's "Museum Leica" book in 2018596.
  • The lens engraved "Leitz Canada 1234567 SUMMARIT 1:2/35" that was located at the Leica Factory Museum in Wetzlar and was illustrated in Mr. Lars Netopil's "Museum Leica" book in 2018596. This lens had optical viewing unit attached to it.
  • The other lens, also with optical viewing unit attached to it and auctioned off at the 7th L&H Photographica Auction. The lot was described as "Here is a rare Campolux 1.4/35mm M mount lens with serial number 1234567. This lens is the prototype of the iconic Summilux 1.4/35mm in M mount, by Dr. Walter Mandler. The name Campolux was not adopted for the production units but two such lenses are known to exist. The offered one has an M3 spectacle viewfinder and the other known specimen is located at the Leica factory museum in Wetzlar (see insert photograph). The name Campolux was not used. Apart for the name and special prototype serial number 1234567, the front rim is black anodized finished, and the aperture flywheel is of a non-serrated grip type. Designed by the most famous postwar Leica optical designer Dr. Walter Mandler, the Summilux-M 1.4/35mm is his most famous design and has become an iconic lens sought after by both users and collectors all over the world. With only two known prototypes, the Campolux-M 1.4/35mm has been ranked as the rarest of all M prototypes.".
  • The third one was illustrated in the "徕卡Summilux 35 1.4 钢嘴/圣光介绍 （增订版）" article and had a black chrome front ring instead of a silver chrome one. This lens was also illustrated in the 7th L&H Photographica Auction catalog on a Leica M3 0056 Prototype .


Prototypes referred to as "Summarit"

There were three known examples of Summarit prototypes:

  • 1959/1960 prototype, numbered 1234567426, belonged to Georg Mann before being auctioned off at the 3rd Wetzlar Camera Auction in October of 2021426. According to the lot description, "only a handful of experimental lenses are known to have been made with this designation, before the „Summilux“ name was found. Based on formula C27 by Dr. Walter Mandler. Unusual lens with silver finish name ring and typical prototype number as used by Leitz Canada at the time. The coating´s residual reflex much different in colour from the later serial production version"426. This prototype was engraved "LEITZ CANADA 1234567 SUMMARIT 1:1.4/35"426.
  • According to "徕卡Summilux 35 1.4 钢嘴/圣光介绍 （增订版）", the second 1959/1960 prototype had optical viewing unit attached to it, which had the focusing ring similar to that of 50mm f/1.4 Summilux lens of the same era. This prototype was engraved "LEITZ CANADA 1234567 SUMMARIT 1:1.4/35". 
  • According to "徕卡Summilux 35 1.4 钢嘴/圣光介绍 （增订版）", the third prototype didn't have optical viewing unit attached to it and it was a screwmount lens (that is, not originally designed for use on Leica M2). This prototype was engraved "LEITZ CANADA 1234567 SUMMARIT 1:1.4/35". This one was believed to have been part of Leica Factory Museum in Wetzlar and was illustrated in Mr. Lars Netopil's "Museum Leica" book in 2018596.


Serial Production

Leitz introduced the 35mm f/1.4 Summilux in 196031, with serial number 1730001439, at  Photokina359. This first variation of 35mm f/1.4 Summilux lens, also referred to as "Steel Rim", was manufactured only by Ernst Leitz Canada31. 

This compact lens was known for its signature glow343. It exhibited softness when used wide open, showed significant chromatic aberrations, created halos, and produced unpredictable bokeh343. At full aperture, the overall contrast was rather low, and the definition of fine detail was limited361. However, stopping down to medium apertures significantly improved the image quality361. This behaviour was typical of the era when designers were exploring the limits and possibilities of high-speed lenses361. The 1960s were characterized by a frantic quest for extreme high-speed lenses with focal lengths ranging from 35 mm to 90 mm361. This search was driven partly by a desire for prestige and partly by the genuine need of photographers experimenting with the boundaries of available-light photography361. During that time, the primary emulsion used was of the ISO 400 type, and push processing made it difficult to capture deep shadow details361. Under these circumstances, any increase in speed was welcome, even if it resulted in reduced contrast and definition361. 

Leitz incorporated rare earth lanthanum glasses for optimum image quality194. 


Variants

There were four types of the first variant of 35mm f/1.4 Summilux:

  • Black finish lenses for Leica M2
  • Black finish lenses for Leica M3
  • Silver chrome finish lenses for Leica M2
  • Silver chrome finish lenses for Leica M3


Black finish lenses for Leica M2, without optical viewing unit ("goggles")

11869 was the catalog number for black anodized aluminum finish343 without optical viewing unit ("goggles") designed for Leica M2194. One source claimed that this type was available after March of 1963479. Focusing down to 1 meters202. Came with an infinity lock342. The insides of the lens were brass343. Lars Netopil interpolated the number of Leica M3 and Leica M2 cameras sold during the period and the estimated the quantities of this type to be 80 black lenses without goggles343. But because the Leica M2 was the accepted camera for wide angle lenses, Lars Netopil suspected that there might actually be around 200 black lenses (and not 80) without goggles, making them very sought after343. Production stopped in 1966263. 

There were 4 different variants of black finish lenses for Leica M2:

  • black finish, black chrome front ring, lens attachment indicator represented by red paint filled into a circular recess, meter scale in white and feet scale in red - Examples included: 1765656, 1765667. Less than 16 examples of this variant exist429. This variant is very rare. The author of "徕卡Summilux 35 1.4 钢嘴/圣光介绍 （增订版）" confirmed with Mr. Lars Netopil that some of the earliest lenses in 1765xxx range had original black steel rims. Some of these had optical viewing units, while others didn't. 
  • black finish, silver chrome front ring, lens attachment indicator represented by red paint filled into a circular recess, meter scale in white and feet scale in red - Examples included: 1765620, 1777520, 1777537, 1777657
  • black finish, silver chrome front ring, lens attachment indicator represented by red hemispherical plastic piece embedded in the recess, meter scale in white and feet scale in red - Examples included: 1777521, 1777654, 1777881, 1777946, 1778177
  • black finish, silver chrome front ring, lens attachment indicator represented by red hemispherical plastic piece embedded in the recess, meter scale in white and feet scale in yellow - Examples included: 1777854, 2166679


Black finish lenses for Leica M3, with optical viewing unit ("goggles")

11872 is the catalog number for black anodised aluminium finish343 with optical viewing unit ("goggles") designed for Leica M3194. One source claimed that the black finish for this lens was available after March of 1963479. Focusing down to 0.65 meters, closer than the Leica M3 rangefinder could normally go, by virtue of a modified cam made possible by the optical viewing unit202. Came with an infinity lock342. Lower profile "ears" on aperture ring263. The insides of the lens were brass343. Lars Netopil interpolated the number of M3 and M2 cameras sold during the period and the estimated the quantities of this type: 160 black lenses with goggles343. The production stopped in 1966263.

There were 4 different variants of black finish lenses for Leica M3:

  • black finish, black chrome front ring, lens attachment indicator represented by red paint filled into a circular recess, meter scale in white and feet scale in red - Examples included: 1765626, 1765652, 1765654. This variant is very rare. The author of "徕卡Summilux 35 1.4 钢嘴/圣光介绍 （增订版）" confirmed with Mr. Lars Netopil that some of the earliest lenses in 1765xxx range had original black steel rims. Some of these had optical viewing units, while others didn't. However, starting from the 177XXXX range, it changed to a silver chrome finish that matched the gloss of the silver chrome type589. This change appeared to be a response to an incident where the plating on the black chrome-finished rim wore off when attaching or detaching the OLLUX/12522 lens hood589. 
  • black finish, silver chrome front ring, lens attachment indicator represented by red paint filled into a circular recess, meter scale in white and feet scale in red - Examples included: 1777496
  • black finish, silver chrome front ring, lens attachment indicator represented by red hemispherical plastic piece embedded in the recess, meter scale in white and feet scale in red - Examples included: 1766098, 1777865
  • black finish, silver chrome front ring, lens attachment indicator represented by red hemispherical plastic piece embedded in the recess, meter scale in white and feet scale in yellow - Examples included: 1765414, 2167141


Silver chrome finish lenses for Leica M2, without optical viewing unit ("goggles")

11870 is the catalog number for chrome version without optical viewing unit ("goggles") designed for Leica M2194. Focusing down to 1 meters202. Came with an infinity lock342. The insides of the lens were brass343. Lars Netopil interpolated the number of Leica M3 and Leica M2 cameras sold during the period and the estimated the quantities of this type to be 3360 chrome lenses without goggles343. The lens attachment indicator on the models came in two variations: the first version featured red paint filled into a circular recess, while the later version had a red hemispherical plastic piece embedded in the recess589.  

There were 2 different variants of silver chrome finish lenses for Leica M2:

  • silver chrome finish, silver chrome front rim, lens attachment indicator represented by red paint filled into a circular recess, meter scale in black and feet scale in red - Examples included: 1730218, 1730355, 1730663, 1730770, 1730789, 1730936, 1731020, 1731027, 1731056, 1765043, 1765545, 1766118, 1766130, 1766133, 1777265, 2061114, 2061139, 2061151, 2061255, 2061381, 2061387, 2061453, 2166595
  • silver chrome finish, silver chrome front rim, lens attachment indicator represented by red hemispherical plastic piece embedded in the recess, meter scale in black and feet scale in red - Examples included: 1765056, 1777109, 1777684, 1778076, 1778719, 1778749, 1778868, 2060521, 2060553, 2060731, 2060916, 2060938, 2061450


Silver chrome finish lenses for Leica M3, with optical viewing unit ("goggles")

11871 is the catalog number for chrome version with optical viewing unit ("goggles") designed for Leica M3194. Focusing down to 0.65 meters, closer than the Leica M3 rangefinder could normally go, by virtue of a modified cam made possible by the optical viewing unit202. Came with an infinity lock342. Lower profile "ears" on aperture ring263. The insides of the lens were brass343. Lars Netopil interpolated the number of M3 and M2 cameras sold during the period and the estimated the quantities of this type to be 4400 chrome lenses with goggles343. The goggle-eyed Summilux lenses were discontinued by 1974202. 1730073 was used in promotional materials and illustrated in Leica Fotografie International (6/1960).

There were 2 different variants of silver chrome finish lenses for Leica M3:

  • silver chrome finish, silver chrome front rim, lens attachment indicator represented by red paint filled into a circular recess, meter scale in black and feet scale in red - Examples included: 1730038, 1730097, 1730474, 1730693, 1765260, 1765387, 1765497, 1765780, 1765829, 1777486, 2061351
  • silver chrome finish, silver chrome front rim, lens attachment indicator represented by red hemispherical plastic piece embedded in the recess, meter scale in black and feet scale in red - Examples included: 1777108, 1777481, 1778116, 1778152, 1778873, 1778882, 2060616, 2060896, 2061058, 2061108, 2061118, 2166557


OLLUX/12522 Lens Hood

The lens originally came with a push-on/twist-off OLLUX/12522 hood202. There were four types of engraving on the OLLUX/12522 lens hoods, presented here in the chronological order589:

  • "LEITZ CANADA OLLUX 1:1.4 /35"589
  • "←LEITZ CANADA→  ←OLLUX 1:1.4/35→"589
  • "←LEITZ CANADA→  ←12522H 1:1.4/35→"589
  • "←LEITZ CANADA→ ←12522 1:1.4/35→"589


Closing Remarks

This variation had a brief production run, with only 7,500 units made between 1961 and 1966343. Leitz's shipping records for these lenses do not specify the finish (black or silver) or the mount version (with or without optical viewing unit ("goggles"))343.

A Leica Summilux camera lens with a black body and silver markings, mounted on a camera body, in front of its original Leica packaging box marked with model number 11871, 1:1.4/35, and an illustration of camera and lens.

35mm f/1.4 Summilux-M - Variation 2

Beginning in 1966, starting with serial number 2166701, this variation featured a simplified lens head and lacked provisions for screw-in filters263. It was likely that the lens formula was recomputed during this time263. This variant had infinity lock/stopper589. The lock button for the infinity stopper was originally painted black on the front, but was later changed to a white chrome finish589. Additionally, some versions featured a black paint over a white chrome finish589.

The catalog numbers were:

  • 11870 for the version without optical viewing unit ("goggles")542 
  • 11871 for the version with optical viewing unit ("goggles") designed for Leica M3542. This version retained the infinity stopper until production ceased in 1974589.

A chrome finished prototype of 11870 numbered 2221575 and dated 1966 was known533.

Series VII filters could be accommodated internally in the 12504 clip-on, divisible lens hood263. The aperture ring included larger profile "ears" to accommodate the new style hood263. The lens was supplied with a black anodized finish only and featured a metal focusing tab with a locking infinity catch263.

35mm f/2 Summicron-M (version 2)

This six-element redesign from Leitz Midland 35mm f/2 Summicron-M (version 2) (catalog number 11309) was a very short lens and was created as a more economical version of its predecessor, which featured eight elements361. The dual approach of improving performance while reducing production costs was initially successful, but after a brief period, both the optical cell and the mount were changed361. The 6 elements125 were arranged in 4 groups361.

This lens offered somewhat better contrast than its predecessor and exhibited no distortion, a quality appreciated by architectural and landscape photographers361. The lens was characterized by good central definition, but it had low contrast in the outer zonal areas361. Only 5,000 units of this lens were manufactured361.

The lens was available in the catalog from mid-1969542 to 1973361 and was suitable for Leica M2 and Leica M4 cameras542. The serial numbers range from 2307451 to 2318400361. The angle of view was 63 degrees361. The minimum focusing distance was 70 cm, or 100 cm on the Leica M3361. The lens weighted 170 grams and had a filter size of E39361. It was offered only in black and featured an infinity lock361.

The lens used a "scooped" focusing lever and was fitted with a protruding aperture control lever125. The lenses were engraved Canada or Wetzlar125. Example of Wetzlar lens given by James L. Lager was 2394610542.

Close-up of a vintage camera lens with focus and aperture rings, black with white and yellow markings, isolated on a white background.
Close-up of a camera lens with black and silver metal components on a white background.

35mm f/1.4 Summilux-M - Variation 3

The variation 3 of the 35mm f/1.4 Summilux-M lens came only in black anodized mount263. This variation had a black plastic focusing tab263. This was the most commonly seen variation of the lens263.

The catalog numbers was 11870 for the version without optical viewing unit ("goggles")542.

The number "35," which indicated the focal length, began to be engraved on the depth-of-field scale ring starting around the serial number 289XXXX589. This design featured a new generation of lenses that were introduced rapidly beginning in 1979589. It was also the first time that a square typeface known as a computer font was utilized589. From around 1985, the letters and numbers on the lens barrel were gradually replaced with computer fonts589. 

Prototype of this lens, numbered C380-002, was illustrated in Mr. Lars Netopil's "Museum Leica" book in 2018596.

Close-up of a vintage camera lens with a lens cap beside it.
Close-up of a vintage camera lens with focus, aperture, and distance markings on a white background.

35mm f/2 Summicron-M (version 3)

Lenses without protruding aperture control lever

In 1973, at serial number 2461001542,a third version of 35mm f/2 Summicron-M (catalog number 11309361) appeared generally without the protruding aperture control lever125. This new version featured a new mount and typically had a traditional aperture-control ring542. This lens also had a 6-element formula (in 4 groups361), although it was somewhat different from the second version125. This version appeared to utilize a new optical formula; however, to the best knowledge of James L. Lager, there had been no official announcement of any optical changes by Leitz542. The new lens had larger entrance and exit pupil diameters compared to the 35mm f/2 Summicron-M (Version 2)542. 

The new optical cell, featuring a middle group of lens elements with a larger diameter, effectively reduced vignetting; however, it introduced some visible distortion361. Overall, the differences in image characteristics were minimal and were only apparent when directly compared with 35mm f/2 Summicron-M (Version 2)361. The 35mm f/2 Summicron-M (Version 3) lens had an additional few millimeters in length, which makes the numbers on the focusing ring easier to read361. 

The lens was in catalog from 1973 till 1979361.

The minimum distance was 70cm and 100cm on Leica M3361. 

The lenses were engraved Canada and not Wetzlar125 and didn't come with infinity lock361. 


Lenses with protruding aperture control lever

Interestingly, there was a little-known and rarely encountered group of very early lenses of 35mm f/2 Summicron-M (Version 3) that fell just above the serial number 2461001, with examples such as 2461275 and 2461800542. These lenses retained the protruding aperture-control lever, which was not typically associated with 35mm f/2 Summicron-M (Version 3) lenses, and surprisingly, they did not have E-39 filter threads542. It seemed that Leitz attempted to standardize on the 12504 lens hood and series VII filters, similar to those used on the 35mm f/1.4 Summilux542. However, due to numerous complaints, Leitz quickly reverted to E-39 threading542.

A vintage camera lens with various dials and markings for focus and aperture settings.
A camera lens with various focusing and aperture settings marked in white and yellow text on a black body.

35mm f/2 Summicron-M (version 4) 

35mm f/2 Summicron-M (version 4) was introduced in 197988. This fourth Midland version of the 35mm f/2 Summicron-M lens, which featured seven elements, produced significantly improved quality at full aperture, particularly in the outer regions of the image361. When stopped down to medium apertures (f/4 to f/5.6), it captured fine details with good clarity, and at smaller apertures (f/8 to f/11), exceptional quality could have been expected across the entire image area361.

Compared to its predecessors, this design was excellent, and its compact size offered notable advantages361. However, it was often referred to as the "bokeh champion" among Leica-M lenses361. While there was some truth to this reputation, it was important to acknowledge that much of it was shrouded in myth361. Leica lenses, especially older or second-hand models, often had special characteristics touted to attract potential buyers, yet in many cases, these traits did not hold up under objective scrutiny361.

The optical capabilities of this lens were constrained by the inherent limitations of the double-gauss design used for wide-angle lenses361. This particular version of the Summicron with the ‘-M’ suffix was a popular choice, with 53000 units allocated and likely sold361.

The lens was in the catalog from 1979 till 1996361. The black version had catalog number 1131088, while the chrome version introduced in 1993 had catalog number 11311361. The serial numbers ranged from 2974251 through 3880946361. The minimum focusing distance was 70cm361. The black version weighted 190 grams (later 160 grams), while chrome version weighted 250 grams361. The filter size was E39361. The lens was very compact with the new small lens hood361. There were 7 elements in 6 groups361. The lens featured a noticeably enlarged exit pupil due to 7 elements125. Also, the lenses were engraved Canada and not Wetzlar125.

The rectangular 12524 lens hood was provided542. James L. Lager advised against rotating the front structure of the lens so that the long dimension of the hood no longer aligned with the camera base542.


Special editions

There was a commemorative edition of this lens, commemorating 70 years of Ur-Leica, engraved "1913 - 1983", to match the Leica M4-P with the same engraving125. The number of lenses totalled least 2,500 units—significantly higher than the often cited figure of 800 units361. 

Leica Summilux-M 1:1.4/35mm aspherical camera lens with lens case and packaging.

35mm f/1.4 Summilux-M ASPHERICAL

35mm f/1.4 Summilux-M ASPHERICAL, also known as "AA" or "Double Aspherical", catalog number 11873352, was introduced in 1988361 with serial number 3459701439.  Leitz announced that it would be a special edition in addition to the regular 35mm f/1.4 Summilux, and it was expected to be available in the second quarter of 1990 with a limited run of 2000 units  361 . Although the lens was expensive to produce, its superior performance quickly became well-known, leading to a demand high enough for additional batches, totalling over 4000 units  361 . One author argued that  only around 1700288 were ever built due to complex manufacturing process340.

The 35mm f/1.4 Summilux-M ASPHERICAL was generally two stops ahead of the original 35mm f/1.4 Summilux Variation 1 "Steel Rim" from 1961361. At an aperture of f/2, it outperformed the older lens at f/5.6361. This lens offered very high contrast and excellent definition across all apertures361. Its high performance at maximum aperture is ideal for slide film emulsions, producing natural colors with good saturation even in low-light conditions361. 

Additionally, this lens was renowned for its subtle rendering of depth in images, resulting in photos with excellent three-dimensionality361. It became a sought-after item among collectors, making it quite difficult to find and extremely expensive361.

The 35mm f/1.4 Summilux-M ASPHERICAL not only had two aspherical elements, but also a radical new optical design288. Lens had enhanced contrast, exceptional detail resolution, reduced curvature effects, and minimal chromatic aberration and coma due to two aspherical surfaces150. Two aspherical lens surfaces gave the optical system an imaging performance even at full aperture that is unique in compact 35mm lenses150. Vignetting was absent at full aperture and not visible at f/1.4150.

The lens featured an angle of view of 64° degrees and contained 9 elements150. Its smallest aperture was f/16, and it had a focusing range extending from infinity down to 0.7 meters.150 The smallest object field measured 420 x 630 mm, which was approximately a 1:17.5 ratio150. Included with the lens were a push-on lens hood (12587542), squeeze-grip542 lens cap (14013542), and rear cover150. The lens cap had a diameter of 49 mm, while the length from the bayonet flange was 44.5 mm, and the largest diameter was 53 mm150. The weight of the lens was 0.275 kg150.

Production ceased in 1994288

The initial list price of the lens was 4050.00 USD150.

3460009 was used in promotional materials and illustrated in Leica Fotografie International (3/1990).

Close-up of a vintage Leica camera lens with focus and aperture rings, marked with red and white indicators, on a white background.

35mm f/1.4 Summilux-M Titanium - Variation 3.1

Introduced in 1992 at Photokina, the 35mm f/1.4 Summilux-M Titanium (catalog number 11860263) complemented the Leica M6 Titanium169. The list price for the lens was 3150 USD upon introduction169. The lens was made in small numbers, in brass mount and titanium finish263.

Technically, this lens belonged in the "35mm f/1.4 Summilux-M - Variation 3"  category. 

3375438 was used in promotional materials and illustrated in Leica Fotografie International (6/1992).

Close-up of a camera lens with distance and aperture markings against a white background.

35mm f/1.4 Summilux-M ASPH

The 35mm f/1.4 Summilux-M ASPH lens was introduced in 1994 and remained in the catalog until 2009361 (or 2010340). This lens had one aspherical element340. The catalog numbers for black, chrome (introduced at Photokina in 1996203) and titanium versions were 11874, 11883 and 11859 respectively361. Serial numbers start at 3636101361. The lens features 9 elements in 5 groups361. The minimum focusing distance was 70 cm361. The weight is approximately 250 grams for the black and 415 gram for the chrome versions361. The filter size is E46361. This lens has one knurled ring361 as opposed to two knurled rings of the 35mm f/1.4 Summilux-M ASPHERICAL, also known as "AA" or "Double Aspherical"361. The lens is also slightly shorter by 1.7mm and lighter than the 35mm f/1.4 Summilux-M ASPHERICAL, also known as "AA" or "Double Aspherical"361.

The technique of polishing (or grinding) aspherical lens surfaces was quite expensive with the classical machinery available to Leica at the time361. Modern Computer Numerical Control (CNC) machinery was not yet developed, leaving the only alternative as the blank-pressing technique pioneered by Zeiss361.

Lothar Kölsch, who transitioned from Zeiss to Leica, played a crucial role in introducing blank-pressed lens elements361. However, not every type of glass can be used for this process, which required adapting the original design of the 35mm f/1.4 Summilux-M ASPHERICAL, also known as "AA" or "Double Aspherical" lens361. The updated lens features one aspherical lens surface made using the blank-pressing method, and it was designated as ASPH. (with a dot)361.

Overall, this lens maintains the same optical performance but has a slightly different character compared to the 35mm f/1.4 Summilux-M ASPHERICAL, also known as "AA" or "Double Aspherical"361. Mechanically, it is exceptionally well-crafted, with perfect centering of all lens elements361. 

For more than fifteen years, this lens has set the standard for high-speed wide-angle lenses361. One aspect to note is its lower performance in the close-focus range, which has been addressed in newer versions featuring floating elements361. However, in most cases, this drop in contrast is not noticeable due to the type of images typically captured with this lens: handheld shots taken with moderately grainy film would make it hard to detect any issues361. 

The lens is regarded as a reliable workhorse from Leica, consistently delivering excellent results and rarely disappointing361.

For the first time, a relatively large lens has been equipped with an aspherical lens surface using the ultra-high precision manufacturing method of press-forming190. This technology has been in use for some time for mass-produced items with lower precision requirements, such as condensers in slide projectors and illumination lenses for car headlights190. However, it had only been applied to small lenses until now190.

The breakthrough was achieved by employing a tool made from a ceramic-like material, which has been diamond-turned multiple times, ground, and polished at specific points190. Additionally, Leica Camera has developed a special technique for mounting these lenses190. This method allows the inevitable tolerances in the assembly of the entire lens system to balance each other out190. Some users say this lens is subject to focus shift340.

The retail price at the introduction was 2695 USD190.

Close-up of a camera lens with aperture and focus distance markings.

35mm f/2 Summicron-M ASPH (version 5) 

The 35mm f/2 Summicron-M ASPH (version 5) was cataloged in 1996361 and introduced in the summer of 1997207, with serial number 3731101439. This lens has been developed by Leica engineers to deliver improved performance at all apertures, particularly at the widest settings207. Images captured with this lens will exhibit finer details and virtually no distortion207. Vignetting at full aperture is minimized and nearly disappears from f/4 onwards207. The lens offers a moderately wide angle of view without distortion207.

To achieve a compact design with enhanced image quality, Leitz utilized a molded aspherical surface207. Additionally, this lens features a specially designed protective lens hood to prevent stray light from affecting the image field207. 

The 35mm f/2 Summicron-M ASPH (version 5) retains many features of the innovative design for high-speed wide-angle lenses that was first introduced with the original Summilux-M 1.4/35 mm aspherical in 1989361. From its maximum aperture to smaller apertures (around f/8), this lens demonstrates high contrast and clarity across most of the image frame361.

The 35mm f/2 Summicron-M ASPH (version 5) lens was initially priced at 1645 USD for the black anodized model (catalog number 11879361) and 1745 USD for the bright chrome version (catalog number 11882361)207.

The titanium version of this lens has a catalog number 11609361.

The serial numbers start from 3731291361.

There are 7 elements in 5 groups, and one aspherical surface361.

The minimum focusing distance is 70cm361.

The black anodizel model weighs 255 gram, whereas chrome and titanium versions each weigh 340 grams361.


Special Editions

There is a special Special platinum version of this lens made for the limited edition “150 Jahre Optik” (catalog number 10481)361.

In 2015, the new version of this lens in black chrome was introduced522. While the technical specifications of the lens remains identical to its serial counterparts, several design changes have been made522. First, the orange focusing scale found on the serial model has been changed to red522. Another distinction from the standard version is the introduction of round, vintage-style lens hood, which is engraved with 'Leica Camera Wetzlar' and 'Made in Germany.'522 Consistent with the elegant design of this special edition, both the lens hood and lens cap are crafted from metal522. This new black-chrome lens is produced in a limited quantity of only 500 units available worldwide522.

A camera lens with focus distance markings in feet and meters, aperture settings, and a red button

35mm f/2.5 Summarit-M

35mm f/2.5 Summarit-M (catalog number 11643361) was introduced in 2007288. It employs a six-element, four-group construction, but it deviates from the traditional double-Gauss design361. With a gap of fifty years separating the Summaron 2.8/35 and the Summarit 2.5/35, there has been a significant advancement in image quality361. The lens remains compact, showcasing an innovative optical design that incorporates modern glass elements and effective optimization techniques361.

Focusing is incredibly smooth and rapid, requiring only a short throw from infinity to close distance, which allows for quick and precise one-finger focusing361. In keeping with Leica's tradition of ensuring a seamless connection between vision and photographic capture, this lens delivers an enjoyable and precise shooting experience361.

The Summarit 2.5/35 mm can be regarded as the ideal companion for travelers who appreciate the advantages of a 35 mm focal length361. It offers exceptional contrast and definition, and its flare resistance is impressive, partly due to the blackened rear mount361.

The angle of view for this lens is 63 degrees and the minimum focusing distance is 80cm361. The weight is 220 grams and the filter size is E39361.

Close-up of a camera lens with focus and aperture settings

35mm f/1.4 Summilux-M ASPH FLE I

The 35mm f/1.4 Summilux-M ASPH FLE I, introduced in 2010288, incorporates the floating element technique, enhancing the basic optical design established in the 1989 edition of this classic and popular lens361. This technology, where an entire group of lenses moves axially according to the distance setting, was first introduced into the M-line with the 50mm f/1.4 Summilux-M ASPH in 2004361. Chrome version of this lens was introduced in 2014 (see p.52 7/2014 Leica Fotografie International).

The main purpose of the floating element technique is to address the loss of contrast that often occurs with stationary lens groups optimized for longer-distance photography361. Additionally, the small focus shift present in the previous version (35mm f/1.4 Summilux-M ASPH) has been eliminated361. 

The 35mm f/1.4 Summilux-M ASPH FLE I is almost the same size as its predecessor (35mm f/1.4 Summilux-M ASPH), but it has doubled in volume compared to the original 1961 35mm f/1.4 Summilux-M - Variation 1 'Steel Rim'361. This increase in volume allows for greater geometric flux, meaning more light energy passes through the lens361. This reduces vignetting and effectively increases the illumination reaching the sensor surface, although it presents more challenges in optical handling361.

One noticeable external change from its predecessor (35mm f/1.4 Summilux-M ASPH) is the replacement of the plastic clip-on lens hood with a sleek metal screw-on version288. This new hood attaches securely in the correct orientation, is more firmly mounted, and takes up less space288. The overall bulk of the lens, including the hood, has been reduced, resulting in less intrusion into the viewfinder288.

A special edition of this lens, limited to 500 pieces, was introduced in 2020 and had "Leitz Wetzlar" engraving on it (see p.88 3/2020 Leica Fotografie International).


 

35mm f/1.4 Summilux-M ASPH FLE I – Technical Data288

Angle of view

For 35mm format (24 x 36mm): 63°, 54°, 37°, (diagonal, horizontal, vertical)

Optical design

Number of lenses / groups: 9/ 5

Aspherical surfaces: 1

Position of entrance pupil: 16.8mm (to the apex of the first lens surface)

Distance settings

Focusing range: 0.7m to infinity

Scales: combined metre / feet gradation

Angle of view

Smallest object field / for 35mm format: approx. 418 x 626mm / 1:17.4

Aperture

Setting / function: With click-stops, half values available

Lowest value: 16

Lens mount

Leica M quick-change bayonet with 6-bit bar-coding for digital M models

Filter mount

Inner threading for E46 screw-in filters, non-rotating front element

Lens hood

Detachable (supplied with the lens)

Viewfinder

Camera viewfinder

Finish

Black anodized

Dimensions

Length to bayonet flange: approx. 58 / 46mm (with / without lens hood)

Largest diameter: approx. 56mm

Weight

Approx. 320g
Close-up of a black camera lens with aperture and focus markings, with metal mount at the bottom, set against a black background.

35mm f/2.4 Summarit-M ASPH

The 35mm f/2.4 Summarit-M ASPH was redesigned and reintroduced in 2014302.

Close-up of a camera lens with aperture and focus distance markings.

35mm f/2 Summicron-M ASPH (version 6) 

The sixth version of 35mm f/2 Summicron-M ASPH was introduced in 2016521. The lens features a screw-mounted metal lens hood521. Imaging quality has improved due to optimizations in the optical design521. The lens is available in both black anodized and silver anodized finishes521. Unlike its predecessor, which had eight aperture blades, this lens features eleven blades521. This change helps create a circular aperture, resulting in a more harmonious rendering of both foreground and background blur521.

Close-up of a camera lens with focus distance scale and aperture markings, including a red focus indicator dot.

35mm f/2 APO-Summicron-M ASPH


The 35mm f/2 APO-Summicron-M ASPH lens was introduced in 2021328. By the time the Leica M10 was released, it became possible to manufacture M lenses with closer focusing capabilities340. The 35mm APO-Summicron-M f/2 ASPH was the first lens to incorporate this newly designed "double cam" focusing mechanism340.

This lens consisted of 10 elements, of which 3 were aspherical (with 4 aspherical surfaces), 6 used apochromatic glass, and 3 were made of glass with high refractive index328. 

Additionally, a new focusing mount was developed to allow for focusing down to 0.3 meters328. To focus between 0.7 and 0.3 meters, use of Live View was needed328.

The lens had a diameter of 53 mm328. Without the screw-in lens hood, its length was 40.9 mm; with the lens hood attached, it measured 49 mm328. The weight of the lens was 305 grams328.

Lens number 4790068 was used in promotional materials and illustrated in Leica Fotografie International (3/2021).

Lens number 4802117 was used in promotional materials and illustrated in Leica Fotografie International (6/2025).


Special Editions

35mm f/2 APO-Summicron-M ASPH "Leica HISTORICA 1975-2025" was announced in October of 2025 to commemorate 50th anniversary of Leica HISTORICA. According to @leicahistorica's Instagram post from August 22, 2026, there were 2 sets, with 50 pieces each. One set was a Leica M-A "Leica HISTORICA 1975-2025" camera, finished in silver chrome with light blue genuine leather covering. The top plate and body featured anniversary and limited-edition engravings. The other set was Leica 35mm f/2 ASPH APO-Summicron lens, "produced for the first time in a silver chrome finish and in Leica’s so-called “Vintage Design”, inspired by the styling of Leica M lenses from the 1950s and 1960s". The afore-mentioned post featured photographs of prototype Leica M-A number 6242195 (P01/P05) with prototype lens numbered 5010295 (P01/P05) and prototype Leica M-A number 1234567 (00/50) with prototype lens numbered 2345678 (00-50) - the same set that was featured on the cover of Vidom 129 (06/2025).

A black camera lens with focus and aperture markings, isolated on a white background.
A vintage silver manual camera lens with focus and aperture adjustment rings and markings in feet and meters.

35mm f/1.4 Summilux-M ASPH FLE II "Close-Focus"


The 35mm f/1.4 Summilux-M ASPH FLE II "Close-Focus" lens was introduced in 2022340. This lens allowed focusing as close as 0.4 meters340. The focusing throw nearly doubled to 176 degrees, providing a noticeable resistance at the 0.7m mark340. Beyond this point, precise focusing required an electronic viewfinder (EVF), Live View, or the Leica Fotos app340.

Additionally, the new slide-out lens hood was more effective and successfully reduced flare340. As a result of these updates, the new lens was approximately 1mm shorter and 1mm thicker than its predecessor340.

The 35mm f/1.4 Summilux-M ASPH FLE II 'Close-Focus' featured 11 aperture blades340. Its optical formula remained the same as that of the 35mm f/1.4 Summilux-M ASPH FLE I340 The lens was available in both black and silver anodized versions, and both options weighed the same340.

Starting December 4, 2025, the lens was available in Safari green finish to match Leica M11-P Safari camera554. Safari green lens number 4985452 was used in promotional materials and illustrated in Leica Fotografie International (6/2026).

35mm f/1.4 Summilux-M "Steel Rim" Reissue

Prototypes

The following prototype lenses were known:

  • number 0000006, dated 2023, that was reportedly stolen in 2023.
  • number 0000030, dated 2023


Serial production

Leica announced a 35mm f/1.4 Summilux-M "Steel Rim" Reissue, the remake of the original 35mm Summilux, the 35mm f/1.4 Summilux-M "Steel Rim" - Variation 1 (catalog number 11870), at the Oskar Barnack Award Ceremony on October 20th, 2022341.

This lens is the fourth reissue by Leica, following the reissues of the 28mm f/5.6 Summaron, the 90mm f/2.2 Thambar, and the 50mm f/1.2 Noctilux343.

The lens is constructed from brass with a silver chrome finish and weighs 200 grams. It comes with two different lens hoods: a remake of the original OLLUX hood and a round screw-in hood. Leica has preserved the "fall-off" characteristics of the original OLLUX, making the screw-in shade a welcome addition. Unlike the original lens, the new version features a 46mm screw thread for attaching filters. The round hood screws into this thread and retains an internal thread, allowing filters to be attached with either shade or without any shade at all343.

As with all its reissues, this lens is not an exact replica, as Leica has made adjustments to both the outer and inner mechanics. The outer dimensions differ, meaning that the new OLLUX shade cannot be used with the old models, and vice versa. The 35mm f/1.4 Summilux-M "Steel Rim" reissue also changed from a 41mm to a 46mm filter thread342.

The reissue includes two shades: the OLLUX-styled one and a more traditional threaded round shade that accepts 46mm filters. The lens maintains the brass and satin silver chrome finish of the original but lacks the brass components inside, making the reissue feel lighter at 211 grams compared to the original's 233 grams342.

Leica's optical engineers have replicated the original lens formula, but the coatings have been improved, resulting in a slight difference in image rendering between the original 35mm f/1.4 Summilux-M "Steel Rim" - Variation 1 (catalog number 11870) and the 35mm f/1.4 Summilux-M "Steel Rim" reissue342.


Special Editions


In 2024, Leica released limited special edition of 35mm f/1.4 Summilux-M "Steel Rim" Reissue in black paint371. The re-issued model in Black Paint was produced in a strictly limited edition of just 200 units371. These lenses were packaged in a classic lens box371. The revival of the 35mm f/1.4 Summilux "Steel Rim" lens was primarily driven by the limited availability of the original, which could only be purchased pre-owned at collector's prices371. Despite Leica's commitment to maintaining the appearance of the original lens, the new model incorporated a few intentional changes371. For example, the historic version featured a clip-on lens hood that often came loose, while the re-edition included a second lens hood that screwed into the newly added E46 filter thread371. Shared characteristics between the two versions included the characteristic stainless steel front ring, known as the 'steel rim', a black anodised finish, reversed feet and meter distance scales, and the engraving of 'Leitz Wetzlar' on the front ring371. Leica's work on this special edition involved far more than just revisiting old blueprints, as evidenced by the new filter thread371. Some of the glass types used in the original design were no longer available and had to be replaced with modern variants that possessed similar properties371. 

Black finished lens number 4879921 was used in promotional materials and illustrated in Leica Fotografie International (3/2012).

A camera lens with a black exterior, focus and aperture rings, and measurements in feet and meters, with a red dot indicator.

35mm f/1.2 Noctilux-M ASPH 

The Leica 35mm f/1.2 Noctilux-M ASPH lens was introduced in January 2026. It marks the debut of the first 35mm Leica Noctilux lens. The author of this website had the opportunity to test one of the first production models available on the market at the Leica Store in Paris Village Royal, France, thanks to the generous assistance of Ms. Vanessa Hernandez. 

The 35mm f/1.2 Noctilux-M ASPH lens was based on the 35mm f/2 APO-Summicron-M ASPH lens565. Leica aimed to make this lens "as compact as possible" to ensure it could be used as an everyday lens565. As a result, the 35mm f/1.2 Noctilux-M ASPH had a notably small form factor for a Noctilux lens565. 

The 35mm f/1.2 Noctilux-M ASPH lens incorporated advancements in aspheric technology and high-reflective glasses, much like the original 50mm f/1.2 Noctilux from 1966565. This new lens was designed using the latest generation of aspheric processing technology known as precision glass molding565.

In this process, spherical lenses that had already been polished were further refined through a molding step565 (an advanced manufacturing process called Precision Glass Moulding566). In this process, tungsten-carbide molds were produced in-house and polished to a precision of 3 nanometers for every 30-millimeter diameter566. The lenses were placed in highly precise molds, heated, and then molded to achieve their final shape565. High-refractive-index glass was then pressed into these coated molds at temperatures exceeding 700 degrees Celsius566. This method allowed the glass to flow slowly into the mold, replicating its precise shape and surface finish565. As a result, Leica was able to create more compact aspherical lenses, including double-sided aspherical lenses like those in the 35mm f/1.2 Noctilux-M ASPH565.

Thanks to this innovative approach, Leica managed to fit three aspherical lenses into this compact design565. Additionally, one of the standout features of the 35mm f/1.2 Noctilux-M ASPH lens was its remarkably smooth and soft bokeh, achieved through the lenses' superior surface accuracy565.

This lens featured a close focus function that operated at a distance of 0.5 meters565. The lens is equipped with E49 filter thread566. 

The 35mm f/1.2 Noctilux-M ASPH protrudes slightly into the rangefinder, obscuring part of the lower-right rangefinder patch566.

Some known lenses were:

  • 4963085, that was used in promotional materials and illustrated in Leica Fotografie International (3/2026).
  • 4963202, that was used in promotional materials and illustrated in Leica Fotografie International (2/2026).