Tokyo Optical Topcor 50mm F/1.5 LSM

Standard prime lens • Film era • Discontinued

  • Announced:
  • · 1954
  • Production status:
  • ● Discontinued
  • Country of design:
  • · Japan
  • Original name:
  • · Tokyo Optical Co. Topcor 1:1,5 f=5cm
  • Class:
  • · Fast full-frame standard prime lens
  • System:
  • · Leotax (1938)

Model history (2)

■Tokyo Optical Simlar 50mm F/1.5 LSMM7 - 43.5 ft.⌀40 1950 ●
■Tokyo Optical Topcor 50mm F/1.5 LSMM7 - 43.5 ft.⌀40 1954 ●

Specification

Optical design:
35mm full frame
50mm
F/1.5
7 elements in 4 groups
Leica screw mount
46.8° (35mm full frame)
Diaphragm mechanism:
Diaphragm type:
Manual
Aperture control:
Aperture ring
12 (twelve)
Focusing:
Coupled to the rangefinder:
Yes
3.5 ft. (~1.05m)
Focusing modes:
Manual focus only
Manual focus control:
Focusing ring
Physical characteristics:
315g
<No data>
Accessories:
Screw-type 40mm
<No data>

Source of data

  • Leotax F brochure.

Manufacturer description

This lens was developed in 1940 by the Tokyo Optical Company as an improved type possessing the characteristics of Sonnar and Summar lenses. It has a click stop diaphragm.

LENS-DB: When the manufacturer states 1940, they are referring to the original version of this lens called the Simlar 50/1.5, which was a standard lens for the Leotax DIV.

From the editor

Standard lens for the Leotax F camera. The basic optical formula remained the same as its predecessor, the Simlar 50/1.5, but the shape and curvature of the optical elements at the rear were changed, as well as the size of one of these elements.

Other standard prime lenses in the Leotax system

■Leica screw mount (13)
Tokyo Optical [C.] Simlar 50mm F/3.5 LSM • Collapsible
akaTokyo Optical State 50mm F/3.5 LSM		M4 - 33.5 ft.A36 1946 ●
Tokyo Optical Topcor 50mm F/3.5 Elmar Type LSM • CollapsibleM4 - 33.5 ft.A36 1954 ●
Tokyo Kogaku Topcor 50mm F/3.5 Tessar Type LSM • CollapsibleM4 - 33.5 ft.A36 1955 ●
Tokyo Kogaku Topcor 50mm F/3.5 Tessar Type LSMM4 - 33.5 ft.⌀34 1955 ●
Tokyo Kogaku Topcor 50mm F/3.5 Elmar Type LSMM4 - 33.5 ft.⌀34 1955 ●
Fuji Photo Film Fujinon L 50mm F/2.8 LSMM5 - ?1.00m⌀40.5 1957 ●
Tokyo Kogaku Topcor 50mm F/2.8 LSMM5 - 33.5 ft.⌀34 1958 ●
Tokyo Kogaku Topcor 50mm F/2 LSMM6 - 53.5 ft.⌀40 1954 ●
Fuji Photo Film Fujinon L 50mm F/2 LSMM6 - ?1.00m⌀43 1957 ●
Tokyo Kogaku Topcor-S 50mm F/2 Type 1 LSMM6 - 43.5 ft.⌀40.5 1957 ●
Tokyo Kogaku Topcor-S 50mm F/2 "Panda" LSMM6 - 41.00m⌀40.5 1957 ●
Tokyo Kogaku Topcor-S 50mm F/2 Type 2 LSMM6 - 41.00m⌀40.5 1958 ●
Tokyo Optical Simlar 50mm F/1.5 LSMM7 - 43.5 ft.⌀40 1950 ●

Lenses with similar focal length

■Leica screw mount (71)
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 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 ●
Voigtlander Nokton 50mm F/1.5 LSMM7 - 51.00m 1953 ●
Yashica [Super-]Yashinon 50mm F/1.8 LSMM6 - 53.5 ft.⌀43 1959 ●
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 ●
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 ●
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 ●
Taylor-Hobson Anastigmat 50mm F/2 LSM • CollapsibleM6 - 43.5 ft. 1951 ●
K.O.L. Xebec 50mm F/2 LSM • Collapsible
akaSun Xebec 50mm F/2 LSM		M6 - 41.00m 1942 ●
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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