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Tokyo Kogaku RE GN Topcor 1:1.8 f=50mm After the rain
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PostPosted: Thu May 28, 2020 3:22 am    Post subject: Tokyo Kogaku RE GN Topcor 1:1.8 f=50mm After the rain Reply with quote

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Last edited by Blazer0ne on Tue Feb 22, 2022 4:36 pm; edited 1 time in total


PostPosted: Thu May 28, 2020 5:07 am    Post subject: Reply with quote

Nice shots.
No, it's not multicoated to my knowledge, only the RE GN 50/1.4 is with the red M.
It's possible the other lenses have more than one layer, the Navy lenses with the N are likely candidates, I don't own any to compare, I suppose it's also possible they chose not to make a fuss over what ever coating they did do till the RE GN 50/1.4, kind of like the Super Takumars had more than one coating but didn't advertise it till they moved to their 7(?) layer Super Multi Coating.
I honestly can't see them not doing Multi coating earlier, when many other companies had it, they were a very resourceful optical company.


PostPosted: Thu May 28, 2020 6:10 am    Post subject: Reply with quote

What aperture were those shot at?


PostPosted: Thu May 28, 2020 3:35 pm    Post subject: Reply with quote

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Last edited by Blazer0ne on Tue Feb 22, 2022 4:36 pm; edited 2 times in total


PostPosted: Thu May 28, 2020 3:43 pm    Post subject: Reply with quote

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Last edited by Blazer0ne on Tue Feb 22, 2022 4:36 pm; edited 1 time in total


PostPosted: Thu May 28, 2020 7:11 pm    Post subject: Reply with quote

Blazer0ne wrote:
Lightshow wrote:
Nice shots.
No, it's not multicoated to my knowledge, only the RE GN 50/1.4 is with the red M.
It's possible the other lenses have more than one layer, the Navy lenses with the N are likely candidates, I don't own any to compare, I suppose it's also possible they chose not to make a fuss over what ever coating they did do till the RE GN 50/1.4, kind of like the Super Takumars had more than one coating but didn't advertise it till they moved to their 7(?) layer Super Multi Coating.
I honestly can't see them not doing Multi coating earlier, when many other companies had it, they were a very resourceful optical company.


By any chance, do you know how many copies were made; at least relative to the faster version?

Coating colors from front
GN 50 1.8 Blue, Amber, Magenta
GN 50 1.4 Amber, Magenta, Green

From Topcon Story
RE GN 50/1.8 code 158B serial 15800001 to 15805360(last known) 1973
RE GN 50/1.4 code 157B serial 15700001 to 15703625(last known) 1973


PostPosted: Thu May 28, 2020 7:44 pm    Post subject: Reply with quote

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Last edited by Blazer0ne on Tue Feb 22, 2022 4:36 pm; edited 1 time in total


PostPosted: Fri May 29, 2020 7:03 pm    Post subject: Reply with quote

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