Difference between revisions of "Tōkyō Kōgaku lenses in Leica screw mount"

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|image_text= "Panda" Topcor-S 5 cm f/2
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|image_by= Dave Tang
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|image= https://live.staticflickr.com/65535/51415745345_cabbf90af9_m.jpg
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|image_text= Topcor 5cm/3.5
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|image_by= simple.joy
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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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* 50/3.5 State (collapsible)
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* 50/3.5 State (collapsible)<REF> Awano, p.123 of {{KKS}} no.32. </REF>
 
* 50/3.5 C Simlar (collapsible)
 
* 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 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 (collapsible), diaphragm ring around the front lens, then around the barrel
 
* 50/3.5 Topcor K (rigid), aluminium barrel and knurled rings
 
* 50/3.5 Topcor K (rigid), aluminium barrel and knurled rings
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* 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)   
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* 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
Line 14: Line 35:
 
* 50/1.5 Simlar
 
* 50/1.5 Simlar
 
* 50/1.5 Topcor
 
* 50/1.5 Topcor
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* 9cm f/4 C Simlar<REF> See [http://www.cameraguild.jp/nekosan/simlar9cm.htm this page of Nekosan's website]. </REF>
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* 9cm f/4 C Simlar<REF> See [http://archive.is/www.cameraguild.jp/nekosan/simlar9cm.htm this page of Nekosan's website] (archived). </REF>
 
* 90/3.5 Topcor, aluminium barrel and knurled rings, sold with an external finder
 
* 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
 
* 135/3.5 Topcor, aluminium barrel, sold with an external finder with 50/90/135 frames
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== Notes ==
 
== Notes ==
 
<references />
 
<references />
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{{br}}
 
== Links ==
 
== Links ==
 
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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* Pages of [http://www.cameraguild.jp/nekosan/ Nekosan's website]:
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* Pages of [http://archive.is/www.cameraguild.jp/nekosan/ Nekosan's website] (archived):
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** [http://www.cameraguild.jp/nekosan/simlar9cm.htm C Simlar 9cm f/4]
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** [http://archive.is/www.cameraguild.jp/nekosan/simlar9cm.htm C Simlar 9cm f/4]
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** [http://www.cameraguild.jp/nekosan/leotax.htm Leotax page] with Tōkyō Kōgaku 39mm screw lenses
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** [http://archive.is/www.cameraguild.jp/nekosan/leotax.htm Leotax page] with Tōkyō Kōgaku 39mm screw lenses
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* [http://ojyamarche.nobody.jp/leotax_lens.html Topcor 5cm f/2 and Topcor-S 5cm f/2] in [http://ojyamarche.nobody.jp/index.html Kensetsu's camera collection]
 
 
* [http://koujiyacamera.hamazo.tv/e738570.html Topcor 3.5cm f/2.8], [http://koujiyacamera.hamazo.tv/e741133.html Topcor 5cm f/3.5] and [http://koujiyacamera.hamazo.tv/e787583.html Topcor-S 5cm f/2] at [http://koujiyacamera.hamazo.tv/ Koujiya's blog]
 
* [http://koujiyacamera.hamazo.tv/e738570.html Topcor 3.5cm f/2.8], [http://koujiyacamera.hamazo.tv/e741133.html Topcor 5cm f/3.5] and [http://koujiyacamera.hamazo.tv/e787583.html Topcor-S 5cm f/2] at [http://koujiyacamera.hamazo.tv/ Koujiya's blog]
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* [http://spblack.ojiji.net/lp0012.html Topcor-S 5cm f/2] and [http://spblack.ojiji.net/lp0020.html Topcor 9cm f/3.5] at [http://spblack.ojiji.net/ Lens Paradise]
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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]
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== More images ==
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{{Flickr_image
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|image_source= http://www.flickr.com/photos/zoomp09/4154843123/in/pool-camerawiki
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|image= http://farm3.static.flickr.com/2668/4154843123_28cebc96b2_n.jpg
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|image_align= right
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|image_text=Topcor-S 5 cm f/2 in m39 Leica thread mount
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|image_by=Dave Tang
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|image_rights= with permission
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}}
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{{M39}}
  
 
[[Category: 39mm screw mount]]
 
[[Category: 39mm screw mount]]
 
[[Category: Japanese lenses]]
 
[[Category: Japanese lenses]]
 
[[Category: Topcon]]
 
[[Category: Topcon]]

Revision as of 06:34, 1 September 2021

-
4154841885_808e5b491a_m.jpg
"Panda" Topcor-S 5 cm f/2
image by Dave Tang (Image rights)
51415745345_cabbf90af9_m.jpg
Topcor 5cm/3.5
image by simple.joy (Image rights)

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

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


Links

In Japanese:

More images

4154843123_28cebc96b2_n.jpg
Topcor-S 5 cm f/2 in m39 Leica thread mount
image by Dave Tang (Image rights)
M39
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