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GOI MC Telegoir f2.8/200mm

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Dr Klaus Schmitt:
Came to me by coincidence when checking out a fleamarket, had that in the back of my head somehow and bought it
as it was a good price, and f2.8/200mm is very nice to use focal length for me (like my CZJ 2.8/200mm Sonnar).

And now I find out that it seems to be a rather rare prototype lens a friend of mine told me, which hasn't been made often,
computed in 1975 and made by GOI in St. Petersburg, the Russian State Optical Institute! Mine is from 1991.

It has Pentax-K bajonet mount and supposedly a 7e/6g lens design (which sounds rather exciting).

Bit hard to find some info about it, but here is one source: http://www.photohistory.ru/index.php?pid=1207248189055283

My lens looks like this:



It has quite a nice modern multicoating:



Here now a size and look comparision with the Carl Zeiss Jena Sonnar electric f2.8 200mm, to show how compact it is:

Dr Klaus Schmitt:
Well, I took a few shots, was after rain, already getting dark...
All shot at f2.8

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Quite sharp it is, snappy and very smooth focusing, auto aperture, high contrast images, CA visible but manageable.

Dr Klaus Schmitt:
Here now a side-a-side comparision with the Carl Zeiss Jena Sonnar electric f2.8/200mm
[if you are able to view crosseye stereo, it is very easy to see..].

Comparison GOI Telegoir (left) vs CZJ Sonnar 200mm (right):

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I conclude the Telegoir is copy of the Sonnar, very sharp already wide open (all tests were done at f2.8 ),
very creamy bokeh, excellent contrast and color (Telegoir is a little warmer), CA nearly as good as the
Sonnar (just a little more cyan OOF). Focal lengths are nearly identical. Both have 7-blade iris. 

BUT - Weight: Telegoir 0.750 kilograms - Sonnar 1.130 kilograms (51% more).
Closest focus: Telegoir 1.5 meters - Sonnar 2.2 meters.

Carl Zeiss Sonnar 200mm is easy to find, GOI Telegoir is extremely rare, have only seen 3-4 in my life...

Nasos Kosmas:
It seems almost identical to me except a little warmer as you stated,very good lens!

Dr Klaus Schmitt:
This lens has a surprising feature despite its modern multicoating...



... and a very small focus shift only.

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