K.O.L. Xebec 50mm F/2 LSM

akaSun Xebec 50mm F/2 LSM

Standard prime lens • Film era • Discontinued • Collectible

  • Announced:
  • · 1942
  • Production type:
  • · Small-batch production
  • Availability:
  • ● Sold out
  • Country of design:
  • · Japan
  • Original name:
  • · K.O.L. Xebec F=5cm 1:2
  • · Sun Xebec 1:2 f=5cm
  • Class:
  • · Fast full-frame standard prime lens
  • System:
  • · Nicca/Yashica (1942)

Specification

Optical design:
35mm full frame
50mm
F/2
6 elements in 4 groups
Leica screw mount
46.8° (35mm full frame)
Diaphragm mechanism:
Diaphragm type:
Manual
Aperture control:
Aperture ring
<No data>
Focusing:
Coupled to the rangefinder:
Yes
1m
Focusing modes:
Manual focus only
Manual focus control:
Focusing lever
Physical characteristics:
<No data>
<No data>
Accessories:
<No data>
<No data>

Source of data

  • Own research.

From the editor

Standard lens for Nippon cameras produced by Gojo Koki Seisakusho in very small quantities from 1942 to 1945. Both the optical design and the collapsible lens barrel were copied from the Leitz Summar 50/2. The lens was originally not rangefinder-coupled, but a coupling cam was added later. In the lens name, the abbreviation K.O.L. stands for Kajiro Optical Laboratory, the original name of the company when it was founded in July 1939. Some time after the company ceased operations in 1945, it was revived under the new name Sun Koki (a fairly well-known Japanese optics manufacturer). Production of the lens then continued under the name Sun Xebec.

Other standard prime lenses in the Nicca/Yashica system

■Leica screw mount (6)
Nicca-L·C 50mm F/3.5 LSM • CollapsibleM4 - 33.5 ft. 1949 ●
Nicca 50mm F/2.8 Type 2 LSMM4 - 33.5 ft.⌀40.5 1958 ●
Nicca 50mm F/2.8 Type 1 LSMM4 - 33.5 ft.⌀34.5 1958 ●
Yashica Yashikor 50mm F/2.8 [II] LSMM5 - 40.90m⌀40.5 1959 ●
Yashica Yashikor 50mm F/2.8 [I] LSMM4 - 33.5 ft.⌀40.5 1959 ●
Yashica [Super-]Yashinon 50mm F/1.8 LSMM6 - 53.5 ft.⌀43 1959 ●

Lenses with similar focal length

■Leica screw mount (74)
Canon 50mm F/1.2 LSMM7 - 51.00m⌀55 1956 ●
Canon 50mm F/1.4 [I] LSMM6 - 41.00m⌀48 1957 ●
Canon 50mm F/1.4 [II] LSMM6 - 41.00m⌀48 1959 ●
Serenar / Canon 50mm F/1.5 LSMM7 - 31.00mS.VII 1952 ●
Serenar / Canon 50mm F/1.8 [I] LSMM6 - 41.00mS.VI 1951 ●
Canon 50mm F/1.8 [II] LSMM6 - 41.00mS.VI 1956 ●
Canon 50mm F/1.8 [III] LSMM6 - 41.00m⌀40 1958 ●
Canon 50mm F/2.2 LSMM5 - 41.00m⌀40 1961 ●
Canon 50mm F/2.8 [I] LSMM4 - 31.00mS.VI 1955 ●
Canon 50mm F/2.8 [II] LSMM4 - 31.00m⌀40 1957 ●
Chiyoko Super Rokkor 45mm F/2.8 [C] LSMM5 - 31.00m 1947 ●
Chiyoda Kogaku Super Rokkor 50mm F/1.8 LSMM6 - 51.00m⌀46 1958 ●
Chiyoko Super Rokkor 50mm F/2.8 [C] LSMM5 - 31.00m⌀40.5 1954 ●
Chiyoko Super Rokkor 50mm F/2 [C] LSMM7 - 61.00m⌀43 1955 ●
Chiyoko Super Rokkor 50mm F/2 LSMM7 - 61.00m⌀40.5 1955 ●
Cosina Voigtlander Color-Skopar 50mm F/2.5 LSMM7 - 60.75m⌀39 2002 ●
Cosina Voigtlander Heliar 50mm F/2 LSM "Cosina 50th Anniversary, Bessa 10th Anniversary" (600 units)M5 - 31.00m⌀39 2009 ●
Cosina Voigtlander Nokton 50mm F/1.5 Aspherical LSMM6 - 50.90m⌀52 1999 ●
Fuji Photo Film Fujinon 50mm F/1.2 LSMM8 - 63.5 ft. 1954 ●
Fuji Photo Film Fujinon L 50mm F/2 LSMM6 - ?1.00m⌀43 1957 ●
Fuji Photo Film Fujinon L 50mm F/2.8 LSMM5 - ?1.00m⌀40.5 1957 ●
Fuji Photo Film Cristar 50mm F/2 LSM • CollapsibleM6 - 43.5 ft. 1949 ●
Konica Hexanon 50mm F/2.4 LSM (1000 units) • CollapsibleM6 - 40.80m⌀40.5 1997 ●
Konishiroku Hexanon 50mm F/1.9 LSMM6 - 53.5 ft.⌀40.5 1956 ●
Leitz Wetzlar / Leitz Canada Summarit 50mm F/1.5 [SOOIA / 11020]M7 - 51.00mE41 1949 ●
Leitz Hektor 50mm F/2.5 [HEKTO, HEKTORKUP, HEKTOCHROM] • CollapsibleM6 - 31.00mA36 1931 ●
Leitz / Leitz Wetzlar Summar 50mm F/2 [SUMAR, SUMARKUP, SUMARCHROM]M6 - 41.00mA36 1933 ●
Leitz / Leitz Wetzlar Summitar 50mm F/2 [SOORE / 11015] • CollapsibleM7 - 41.00mE36.4 1939 ●
Leitz Wetzlar Xenon 50mm F/1.5 [XEMOO]M7 - 51.00mA51 1936 ●
Leitz Wetzlar Summicron 50mm F/2 [I] [SOOIC / 11016] • CollapsibleM7 - 61.00mE39 1953 ●
Leitz Wetzlar Compur-Summicron 50mm F/2 (150 units)M? - ?1.00m 1954 ●
Leitz Wetzlar Elmar 50mm F/2.8 [I] [ELMOO / 11512, ELMOO / 11012] • CollapsibleM4 - 31.00mE39 1957 ●
Leitz / Leitz Wetzlar Summar 50mm F/2 [SUMUS, SUMUSKUP, SUMUSCHROM] • CollapsibleM6 - 41.00mA36 1934 ●
Light Lens Lab Noctilucent 50mm F/1.2 ASPH. "1966"M6 - 41.00m⌀49 2024 ●
Light Lens Lab Elcan 50mm F/2M4 - 40.70m⌀39 2022 ●
Nippon Kogaku Nikkor-H·C 50mm F/2 LSM • CollapsibleM6 - 33.5 ft.S.VI 1947 ●
Nippon Kogaku Nikkor-H[·C] 50mm F/2 LSMM6 - 31.5 ft.S.VI 1950 ●
Nippon Kogaku Nikkor-S·C 50mm F/1.5 LSM (408 units)M7 - 51.5 ft.⌀40.5 1949 ●
Nippon Kogaku Nikkor-S[·C] 50mm F/1.4 LSMM7 - 31.5 ft.S.VII 1950 ●
Nippon Kogaku Nikkor-N·C 50mm F/1.1 LSM (211 units)M9 - 63.5 ft.⌀62 1956 ●
Jupiter-8 50mm F/2 LSM
akaЮПИТЕР-8 50mm F/2 [П]		M6 - 31.00m⌀40.5 1947 ●
Industar-61[L/D] 52mm F/2.8 LSM
akaИ-61 52mm F/2.8
akaИ-61Л/Д 53mm F/2.8
akaИ-61Л/Д 55mm F/2.8
akaИНДУСТАР-61Л/Д 55mm F/2.8		M4 - 31.00m⌀40.5 ●
Jupiter-3 50mm F/1.5 LSM
akaЮПИТЕР-3 50mm F/1.5 [П]		M7 - 31.00m⌀40.5 1948 ●
Industar-26M 50mm F/2.8 LSM
akaИ-26м 52mm F/2.8
akaИНДУСТАР-26м 50mm F/2.8 П		M4 - 31.00m⌀40.5 1954 ●
FED 50mm F/2 LSM • Collapsible
akaФЭД 50mm F/2		M6 - 41.00mA36 ●
Jupiter-17 50mm F/2 LSM
akaЮПИТЕР-17 50mm F/2 П		M5 - 41.00m⌀40.5 1953 ●
Steinheil Munchen Quinon 50mm F/2 LSMM6 - 30.60m ●
Tanaka Kogaku Tanar 50mm F/2.8 LSMM4 - 33.5 ft. 1954 ●
Tanaka Kogaku Tanar 50mm F/2.8 H.C. Close Focus LSMM4 - 31.5 ft. 1955 ●
Tanaka Kogaku Tanar 50mm F/2.8 H.C. Close Focus LSM BlackM4 - 31.5 ft. 1957 ●
Tanaka Kogaku Tanar 50mm F/2 H.C. LSMM6 - 31.5 ft.⌀40.5 1956 ●
Tanaka Kogaku Tanar 50mm F/2 H.C. LSM BlackM6 - 31.5 ft.⌀40.5 1957 ●
Tanaka Kogaku Tanar 50mm F/1.9 LSMM6 - 30.60m⌀40.5 1959 ●
Tanaka Kogaku Tanar 50mm F/1.8 LSMM6 - 30.60m 1960 ●
Tanaka Kogaku Tanar 50mm F/1.5 H.C. LSMM7 - 32 ft. 1957 ●
Teikoku Kogaku Zunow 50mm F/1.1 [I] LSMM9 - 53.5 ft.⌀54.5 1953 ●
Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSMM8 - 53.5 ft.⌀54.5 1955 ●
Tokyo Kogaku Topcor-S 50mm F/2 Type 2 LSMM6 - 41.00m⌀40.5 1958 ●
Tokyo Kogaku Topcor-S 50mm F/2 Type 1 LSMM6 - 43.5 ft.⌀40.5 1957 ●
Tokyo Kogaku Topcor 50mm F/2.8 LSMM5 - 33.5 ft.⌀34 1958 ●
Tokyo Optical Topcor 50mm F/1.5 LSMM7 - 43.5 ft.⌀40 1954 ●
Tokyo Kogaku Topcor 50mm F/2 LSMM6 - 53.5 ft.⌀40 1954 ●
Tokyo Kogaku Topcor-S 50mm F/2 "Panda" LSMM6 - 41.00m⌀40.5 1957 ●
Tokyo Optical Simlar 50mm F/1.5 LSMM7 - 43.5 ft.⌀40 1950 ●
Voigtlander Nokton 50mm F/1.5 LSMM7 - 51.00m 1953 ●
Yasuhara 50mm F/2.8 MC LSMM4 - 30.80m⌀35.5 2001 ●
Zuiho Honor 50mm F/2 LSMM6 - 43.5 ft. 1959 ●
Zuiho Honor 50mm F/1.9 LSMM? - ?3.5 ft.⌀43 1959 ●
Taylor-Hobson Anastigmat 50mm F/2 LSM • CollapsibleM6 - 43.5 ft. 1951 ●
Phenix 50mm F/2.8 MC LSM (500 units) • CollapsibleM4 - 30.70m⌀35.5 1999 ●
Lomography x Zenit New Jupiter-3+ 50mm F/1.5 LSMM7 - 30.70m⌀40.5 2016 ●
Carl Zeiss Jena Sonnar 50mm F/2 T LSM • CollapsibleM6 - 31.00m ●
Carl Zeiss Jena Sonnar 50mm F/2 T LSMM6 - 31.00m ●
Carl Zeiss Jena Sonnar 50mm F/1.5 T LSMM7 - 31.00m ●

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