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Polaris Auto Zoom Lenses (YS mount)
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PostPosted: Thu Apr 07, 2022 4:12 am    Post subject: Polaris Auto Zoom Lenses (YS mount) Reply with quote
Brochure circa early to mid 1970s. It isn't explicitly stated in the brochure, but these are YS mount lenses.
(YS was a modified T mount system which enabled automatic diaphragm operation.)

My guess is Sun manufactured at least some of these lenses. But I don't know that for certain.
[Edit: Sigma is also a possible manufacturer of these Polaris lenses. See this thread:
http://forum.mflenses.com/ys-mount-for-sigma-lenses-only-t83762.html]


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Last edited by 55 on Thu Jun 02, 2022 2:53 pm; edited 2 times in total


PostPosted: Thu Apr 07, 2022 5:43 am    Post subject: Reply with quote
I have the preset 6.3 m42 version of 90-190, did not know that there is auto too.


PostPosted: Sat Apr 09, 2022 5:11 am    Post subject: Reply with quote
F/6.3? Interesting. That lens appears to have come in different forms under several different brand names.
My 90-190 f/5.8 is a preset Sears.


PostPosted: Sat Apr 09, 2022 9:46 am    Post subject: Reply with quote
55 wrote:
F/6.3? Interesting. That lens appears to have come in different forms under several different brand names.
My 90-190 f/5.8 is a preset Sears.


no, actually it was 90/5.8 - 190/6

I just remember the 6 and rounded it to 6.3 Very Happy
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