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Tōkyō Kōgaku lenses in Leica screw mount

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Tōkyō Kōgaku (maker of the Topcon cameras) made lenses in 39mm Leica mount for some Japanese Leica copies, mainly the Leotax. All were all chrome unless noted. The chronological order is State - C Simlar - Simlar - Topcor - Topcor S.

  • 35/2.8 Topcor, sold with a very big external finder
  • 50/3.5 State (collapsible)[1]
  • 50/3.5 C Simlar (collapsible)
  • 50/3.5 Simlar (collapsible), also as "Simlar 1:3,5 f=5cm Tokyo Opt. Co."
  • 50/3.5 Topcor (collapsible), diaphragm ring around the front lens, then around the barrel
  • 50/3.5 Topcor K (rigid), aluminium barrel and knurled rings
  • 50/2.8 Topcor,(rigid) black and chrome finish. (Heliar) Optical design is a copy of the 1952 Voigtländer (R&D) "Color Heliar" (Extremely rare lens due to very low production numbers)
  • 50/2 Topcor
  • 50/2 Topcor S, chrome, then black and chrome, then black with aluminium barrel
  • 50/1.8 Topcor S, black finish
  • 50/1.5 Simlar
  • 50/1.5 Topcor
  • 9cm f/4 C Simlar[2]
  • 90/3.5 Topcor, aluminium barrel and knurled rings, sold with an external finder
  • 135/3.5 Topcor, aluminium barrel, sold with an external finder with 50/90/135 frames

Notes Edit

  1. Awano, p.123 of Kurashikku Kamera Senka no.32.
  2. See this page of Nekosan's website.

Links Edit

In Japanese:


M39
b
o
d
i
e
s
(at) Wica
(de) Leica I (A) | Leica I (C) | Leica II (D) | Leica Standard (E) | Leica III (F) | Leica 250 Reporter | Leica IIIa (G) | Leica IIIb | Leica IIIc | Leica Ic | Leica IIIf | Leica IIIg
(ja)  Alta | Baika | Bessa L/T/R | Canon II/III/IV | Canon VT | Canon VIT | Canon P | Canon 7 | Canon 7s | Chiyoca | Chiyotax | Gokoku | Honor S1 | Honor SLIchicon-35 | Jeicy | Konica FR | Lausar | Leotax | Leotax G | Melcon | Melcon II | Muley | Nicca | Nicca III-L | Nippon | Tanack 35/IIIS/IV-S | Tanack SD | Tanack VP | Teica | Yasuhara T981
(uk) Periflex | Reid
(ussr) FED | Zorki | MIR | Drug | Leningrad
M39
l
e
n
s
e
s
(de) Astro Berlin | Enna | Hensoldt | Isco | Meyer | Rodenstock | Schacht | Schneider | Steinheil | Voigtländer | Zeiss
(ja) Arco (Colinar, Snowva) | Canon (Serenar) | Fuji (Cristar, Fujinon) | K.O.L. (Xebec) | Konica (Hexanon) | Konishiroku (Hexar, Hexanon) | Kowa (Prominar)Kyōei (Acall) | Lena | Leotax | Chiyoda / Minolta (Rokkor) | Misuzu (Altanon) | MS Optical R&D | Nicca | Nippon Kōgaku (Nikkor) | Olympus (Zuiko)Orion (Supreme) | Pentax | Reise | Ricoh | Sankyō (Komura) | Shōwa Kōki (Piotar) | Sun (Sola, Sophia, Xebec) | Tanaka (Tanar) | Telesar | Tōkyō Kōgaku (Simlar, Topcor) | Voigtländer | Y.K. Optical (Kobalux, Avenon) | Zeika (Rojar) | Zuihō (Honor) | Teikoku / Zunow
(fr) Angénieux | Berthiot
(uk) Corfield | Dallmeyer | National Opt. Co. | Pam | Ross | Taylor, Taylor & Hobson
(it) Elionar | Koritska | Kristall | Trixar | Wega
(nl) Old Delft
(us) Bausch & Lomb | Kodak

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