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

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''Tokyo Kogaku'', later renamed [[Topcon]], made some 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.
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{{Flickr_image
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|image_source= http://www.flickr.com/photos/zoomp09/4154841885/in/pool-camerawiki
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|image= http://farm3.static.flickr.com/2530/4154841885_808e5b491a_m.jpg
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|image_align= right
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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_rights= with permission
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}}
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|-
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{{Flickr_image
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|image_source= https://www.flickr.com/photos/192035898@N07/51415745345/in/pool-camerawiki/
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|image= https://live.staticflickr.com/65535/51415745345_cabbf90af9_m.jpg
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|image_align= right
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|image_text= Topcor 5cm/3.5
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|image_by= simple.joy
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|image_rights=  with permission
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}}
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|}
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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.
 
* 35/2.8 Topcor, sold with a very big external finder
 
* 35/2.8 Topcor, sold with a very big external finder
* 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)
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* 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
* 50/2.8 Topcor, black and chrome finish
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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 Topcor
 
* 50/2 Topcor
 
* 50/2 Topcor S, chrome, then black and chrome, then black with aluminium barrel
 
* 50/2 Topcor S, chrome, then black and chrome, then black with aluminium barrel
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* 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://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 ==
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<references />
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{{br}}
 
== Links ==
 
== Links ==
* [http://www003.upp.so-net.ne.jp/Topconclub/lens6.htm 39mm lenses page of the Topcon club]
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In Japanese:
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* [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://archive.is/www.cameraguild.jp/nekosan/ Nekosan's website] (archived):
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** [http://archive.is/www.cameraguild.jp/nekosan/simlar9cm.htm C Simlar 9cm f/4]
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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://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: Japan]]
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[[Category: Japanese lenses]]
 
[[Category: Topcon]]
 
[[Category: Topcon]]

Latest 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

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


Links

In Japanese:

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