Difference between revisions of "Tōkyō Kōgaku lenses in Leica screw mount"
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|image_text= "Panda" Topcor-S 5 cm f/2 | |image_text= "Panda" Topcor-S 5 cm f/2 | ||
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| + | |image_text= Topcor 5cm/3.5 | ||
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[[Tōkyō Kōgaku]] (maker of the Topcon cameras) made lenses in [[39mm screw lenses|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. | [[Tōkyō Kōgaku]] (maker of the Topcon cameras) made lenses in [[39mm screw lenses|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 | * 35/2.8 Topcor, sold with a very big external finder | ||
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== Links == | == Links == | ||
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In Japanese: | In Japanese: | ||
* [http://www003.upp.so-net.ne.jp/Topconclub/lens6.htm Tōkyō Kōgaku 39mm screw lenses] at the [http://www003.upp.so-net.ne.jp/Topconclub/ Topcon Club website] | * [http://www003.upp.so-net.ne.jp/Topconclub/lens6.htm Tōkyō Kōgaku 39mm screw lenses] at the [http://www003.upp.so-net.ne.jp/Topconclub/ Topcon Club website] | ||
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* [http://pwfukagawa.blog98.fc2.com/blog-entry-82.html Topcor-S 5cm f/2] at [http://pwfukagawa.blog98.fc2.com/ Fukugawa Seimitsu Kōbō] | * [http://pwfukagawa.blog98.fc2.com/blog-entry-82.html Topcor-S 5cm f/2] at [http://pwfukagawa.blog98.fc2.com/ Fukugawa Seimitsu Kōbō] | ||
| + | == More images == | ||
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| + | |image_text=Topcor-S 5 cm f/2 in m39 Leica thread mount | ||
| + | |image_by=Dave Tang | ||
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{{M39}} | {{M39}} | ||
Revision as of 06:34, 1 September 2021
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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
- ↑ Awano, p.123 of Kurashikku Kamera Senka no.32.
- ↑ See this page of Nekosan's website (archived).
Links
In Japanese:
- Tōkyō Kōgaku 39mm screw lenses at the Topcon Club website
- Pages of Nekosan's website (archived):
- C Simlar 9cm f/4
- Leotax page with Tōkyō Kōgaku 39mm screw lenses
- Topcor 3.5cm f/2.8, Topcor 5cm f/3.5 and Topcor-S 5cm f/2 at Koujiya's blog
- Topcor-S 5cm f/2 and Topcor 9cm f/3.5 at Lens Paradise
- Topcor-S 5cm f/2 at Fukugawa Seimitsu Kōbō
More images
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| Topcor-S 5 cm f/2 in m39 Leica thread mount image by Dave Tang (Image rights) |
