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Kuribayashi Petri C.C. Orikkor 2/50
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PostPosted: Mon Jan 30, 2017 11:50 pm    Post subject: Reply with quote

edri wrote:
Thanks. Recently?
if you check ebay often you'll see that one pops up every month or 2.. usually attached to a camera.

Look for one with the 52mm filter thread that either says "Kuribayashi" or "Orrikor" or both

The M42 threaded one is more ideal of course.. the Petri Bayonet one will be harder to adapt and require some DIY but not impossible

--mike


PostPosted: Tue Jan 31, 2017 10:04 pm    Post subject: Reply with quote

Thanks for the info.


PostPosted: Sun Aug 20, 2017 5:06 pm    Post subject: Reply with quote



PostPosted: Sun Aug 20, 2017 10:14 pm    Post subject: Reply with quote

D. P. wrote:


Superb image.
Five stars from me.
Congratulations DP
Tom


PostPosted: Mon Aug 21, 2017 9:06 am    Post subject: Reply with quote

Like 1 small Like 1 small Like 1 small

I, too, have that lens, shoulg dig it out I guess..


PostPosted: Thu Oct 31, 2019 11:06 pm    Post subject: Reply with quote

Some first shots of the lens with my A7II & KECAY M42/E-Mount Helicoid


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PostPosted: Fri Nov 01, 2019 1:12 pm    Post subject: Reply with quote

Really very good pics.

IT's very rare thing that in your best 10 lenses thread, nobody puts this lens among those best ones.

For my eyes is by far more sharp than the helios 44 and with the same pleasent bokeh.

I don't know if the orikkor ones are the same 7 elements than the last bayonet Petri version without orikkor word ar the front ring.


PostPosted: Sun Nov 03, 2019 2:33 am    Post subject: Reply with quote

Nice to see this thread still going. I haven't used mine in a while, but since I first posted, the M42 blog has done an interesting review of this lens: https://spiral-m42.blogspot.com/2017/05/petri-camera-co-high-speed-petri-part-3.html

I think I'm going to give mine some use next time I load up one of my M42 cameras.


PostPosted: Sun Nov 03, 2019 2:18 pm    Post subject: Reply with quote

Is this lens radioactive? the ad presented in this thread says it contains "rare earth"


PostPosted: Sun Nov 03, 2019 5:03 pm    Post subject: Reply with quote

Very nice images, it reminds me a bit a MOG Domiron. Here is another nice link:

http://pakira3.sakura.ne.jp/wp/?p=77220


PostPosted: Sun Nov 03, 2019 10:47 pm    Post subject: Reply with quote

"Rare earth" describes a number of minerals, not all of which are radioactive. I don't know what glass Petri used though, but it could be any number minerals.

As for the link above, thanks! I think most of the Petri lenses give a rather Meyer-esque look, but this one in particular is a little more unique than most of them, I don't really know of another lens quite like it.


PostPosted: Wed Nov 06, 2019 6:33 pm    Post subject: Reply with quote

My question concerning radioactivity was for those who have this lens and are able to measure it.


PostPosted: Wed Nov 06, 2019 9:41 pm    Post subject: Reply with quote

Sorry for attempting to answer.


PostPosted: Thu Nov 07, 2019 4:49 pm    Post subject: Reply with quote

Mos6502 sorry, nothing personal, but this lens was produced for a short period of time and was more complicated than next model, it gives an assumption that it might be rad one, if you have one it would be nice to have a check.


PostPosted: Thu Nov 07, 2019 7:43 pm    Post subject: Reply with quote

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PostPosted: Fri Nov 08, 2019 7:49 pm    Post subject: Reply with quote

Macheck, I do have this lens (I started this thread after all) but no way to measure if it is radioactive. I suspect that the reason for its complexity just has to do with the state of lens technology at the time. It is easy to forget that creating a fast 50 that would clear an SLR mirror was still a big deal in the 1950s, and very few actual 50mm lenses existed in speeds higher than f/2.8, most companies settling on a slightly longer focal length of 55 or 58mm. This lens was most likely designed in-house by Petri, and the "excess" complexity of the design is probably just the result of inexperience in producing this sort of lens, as Petri had never made an SLR, nor a lens for one, before. It should be noted that Nikon's original 2/50 for the F was also a seven element design, before it was revised, becoming a conventional six elements in four groups design. So even the big names had some trouble with this.


However, as seen above, Nikon's approach was a little less original than Petri's.

Wolfhansen, thank you for the photos! Nice examples of exaggerated OOF rendering of the Orikkor - it makes me think of how painters, imitating photographs, would render a background.


PostPosted: Fri Nov 08, 2019 8:37 pm    Post subject: Reply with quote

Summicron M 2/50 till 1969 had not any problem with the seven elements lenses.

The Nikon 2/50 remind me a bit of the Ultron/planar (Icarex/Rollei mounts)