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Kuribayashi - Petri site with lots of information
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PostPosted: Fri Jan 19, 2018 5:41 am    Post subject: Kuribayashi - Petri site with lots of information Reply with quote
Some of you may have visit this Japanese site already.
https://www52.atwiki.jp/petri/

There are lots of useful information on the site which includes lots of internal material. The following link includes the lens data sheet in the late 60s:
https://www52.atwiki.jp/petri/pages/308.html

and development schedules
https://www52.atwiki.jp/petri/pages/296.html

and more ..
https://w.atwiki.jp/petri/pages/161.html

Last edited by calvin83 on Sat Dec 02, 2023 8:37 am; edited 1 time in total


PostPosted: Fri Jan 19, 2018 11:34 am    Post subject: Reply with quote
Nice find, thanks for sharing. 1.4/55mm seems serious 7 elements design.


PostPosted: Fri Jan 19, 2018 1:04 pm    Post subject: Reply with quote
Anyone know anything about the 40/1.7?
As in, only in a fixed lens camera?
http://www.lomography.es/lenses/1262-petri-1-1-7-f-40mm-lens/photos


PostPosted: Fri Jan 19, 2018 2:03 pm    Post subject: Reply with quote
Yes. The 40/1.7 can only be found fixed lens camera.


PostPosted: Fri Jan 19, 2018 4:56 pm    Post subject: Reply with quote
Thanks Calvin, I'll have to keep an eye out for a non functional unit.
I wish there were more fast 40-45's out there.


PostPosted: Fri Jan 19, 2018 6:34 pm    Post subject: Reply with quote
Thanks for the site link!

Very interesting especially the lens information. Several questions were answered.

It seems that quite a few of the Petri lenses were indeed in-house designs. That answers some questions of origins

But some also seem to be from Sun, that I have not seen I'd before.
Sun branded primes of the 1960's aren't that common so I am sure we have seen plenty of these that have not been correctly identified.

And the company that owned the Kyoei Acall name was Kyogo Optical. A starting point for other inquiries I think. Kyoei was another brand, not the original company name.


PostPosted: Fri Jan 19, 2018 7:43 pm    Post subject: Reply with quote
The Acall brand is own by Kyoei Optical Co.. A Japanese site mentioned the Kyoei Optical Co.(協栄光学) was established by the ex-employee of Sankyo Kohki(三協光機), some of the design drawing and parts and were stolen the factory of Sankyo Kohki during the labor dispute. There are other source mentioned the two company are partners.


PostPosted: Fri Jan 19, 2018 8:29 pm    Post subject: Reply with quote
Ah, the Petri site makes an error then about Kyoei.


PostPosted: Sat Jan 27, 2018 2:47 pm    Post subject: Reply with quote
Look what I found!


#1


#2


PostPosted: Sat Jan 27, 2018 7:27 pm    Post subject: Reply with quote
Wonderful Calvin, superb material!! Like 1 small Like 1 small Like 1 small


PostPosted: Sun Jan 28, 2018 12:27 am    Post subject: Reply with quote
This 55 / 1.8 lens really is one of the best std lenses that I've got, I expected nothing more than mediocrity when I bought this camera and lens in a box full of stuff from a charity shop, but I was wrong. And the camera looks very good as well, maybe not 'exceptional' but up there with Pentax, Canon and the other big manufacturers.

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