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Soviet KO-120M 120mm/1.8
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PostPosted: Wed Jul 30, 2014 6:11 pm    Post subject: Soviet KO-120M 120mm/1.8 Reply with quote
Hi everybody,

Here is another projection lens adapted to M42 with focus ring. It's look a bit like Petzval diagram, but not exactly :



So it has big spherical aberration, but funny to use. It naturely cover FF (it's a big lens). It was made buy MMZ, looks to be old (from 60')


Here is the lens :


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PostPosted: Wed Jul 30, 2014 6:37 pm    Post subject: Reply with quote
Very nice results with swirly bokeh.
Looks a bit like a petzval.
How exactly did your conversion work?


PostPosted: Wed Jul 30, 2014 6:48 pm    Post subject: Reply with quote
bernhardas wrote:
Very nice results with swirly bokeh.
Looks a bit like a petzval.
How exactly did your conversion work?


I don't know exactly, I didn't converted, it's a friend here in Odessa who do it. But to focus, I just turn the lens, like normal focus. He certainly inserted an helicoidal in this cup.


PostPosted: Wed Jul 30, 2014 7:02 pm    Post subject: Re: Soviet KO-120M 120mm/1.8 Reply with quote
BurstMox wrote:
Here is another projection lens adapted to M42 with focus ring. It's look a bit like Petzval diagram, but not exactly


I believe it IS a Petzval type lens.
It appears to be a clone of the Zeiss Kipronar H-FT*. Take a look at the diagram P3 here:

http://forum.mflenses.com/roger-cicala-tests-lomographys-petzval-lens-t67138.html


PostPosted: Wed Jul 30, 2014 9:11 pm    Post subject: Reply with quote
Petzvals are great! Great adaptation - elegant look Smile


PostPosted: Wed Jul 30, 2014 11:35 pm    Post subject: Reply with quote
Looks nice to me!


PostPosted: Wed Jul 30, 2014 11:57 pm    Post subject: Reply with quote
I like - looks quite good.


PostPosted: Thu Jul 31, 2014 3:33 pm    Post subject: Re: Soviet KO-120M 120mm/1.8 Reply with quote
Gerald wrote:
BurstMox wrote:
Here is another projection lens adapted to M42 with focus ring. It's look a bit like Petzval diagram, but not exactly


I believe it IS a Petzval type lens.
It appears to be a clone of the Zeiss Kipronar H-FT*. Take a look at the diagram P3 here:

http://forum.mflenses.com/roger-cicala-tests-lomographys-petzval-lens-t67138.html


You're right, looks like the same diagram.

Thanks for you comments! Smile
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