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Help with lens issue!
Old 05-19-2017   #1
Cabledog
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Unhappy Help with lens issue!

So I picked up a mamiya 6 with the 50mm lens for a pretty good deal. Everything is in perfect condition except I just noticed what appears to be decementing on the rear element. Can anyone tell me if this will affect image quality or cause diffraction issues?
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Old 05-19-2017   #2
xayraa33
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I would doubt that would greatly effect image quality in photographs .
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Help with lens issue!
Old 05-19-2017   #3
jonmanjiro
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Help with lens issue!

The white dots around the edge? I'd say that's schneideritis. It looks like a pretty mild case. I suspect at the most you "might" see a very minor increase in flare when shooting in difficult lighting. Most likely you won't see anything at all.
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Old 05-19-2017   #4
Cabledog
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How can i tell if it's all the way through the lens to the center or if it's just at the edges?
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Old 05-21-2017   #5
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Assuming it is schneideritis (which it certainly looks like), it only forms between the edge of the glass elements and the metal lens barrel.
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