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Optics Theory - This forum is aimed towards the TECHNICAL side of photographic OPTICS THEORY. There will be some overlap by camera/manufacturer, but this forum is for the heavy duty tech discussions. This is NOT the place to discuss a specific lens or lens line, do that in the appropriate forum. This is the forum to discuss optics or lenses in general, to learn about the tech behind the lenses and images. IF you have a question about a specific lens, post it in the forum about that type of camera, NOT HERE.

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jupiter 12 contax /leica
Old 08-28-2019   #1
raultrasonic
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jupiter 12 contax /leica

Hi friends Do you know , if its possible to transplant the back optics group of a jupiter 12 for contax in to a leica screw one?


thank a lot
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Old 08-28-2019   #2
Ko.Fe.
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It is never recommended to make one lens from two for optics.
Any optics, any lenses.
J-12 is 80 bucks in LTM.
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Old 08-28-2019   #3
pixelated
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It likely is possible. But, more or less as Ko.Fe. points out, a conversion would likely cost more than just getting a LTM J-12.
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Old 08-28-2019   #4
santino
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I think he does not want to convert the lens probably has a damaged kens in ltm and a good one in contax mount. It is possible but maybrequire some fine tuning. I wouldn‘t recommend it.
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Old 08-29-2019   #5
Phil_F_NM
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If you're just wanting to transplant the rear optical block from the Contact to the LTM lens, it's absolutely possible. You'll want to ensure that the J12 lenses are both from relatively similar build periods. For example, I wouldn't want to do this transplant from an early 80s lens to a 1950s lens but even then it can definitely be done. Considering the QC that went into most of the FSU gear, you may wind up with a better optic than the original.
Phil Forrest
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Old 08-31-2019   #6
raultrasonic
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ok i note all the replays and ideas .
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