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Schneideritis?


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This is on a Kinoptic Tegea 5.7, c-mount.
It looks just like plain, good old chips of paint peeled of the barrel. Could this be schneideritis?

I bought it from a gentleman on ebay, who was surprised to see my pictures.
On the ad the lens looks absolutely normal.
I have no reason to doubt this gentleman's good faith. Could this have happened during transport?

And more importantly, do you think this would affect image quality?

 

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Schneideritis, as some call it, is usually speckled dots visible around the edge when you look into the front, caused by degradation of the edge blacking of elements. This looks more like paint lifted or flaked off the seating base of a highly concave element, so similar yes. It may have been caused by an element being vibrated during transport, if it wasn't there before. Or condensation forming due to temperature variations that loosens old paint, etc.

Usually this sort of thing just increases internal light scattering, so you might get slightly reduced contrast. A large bare area might cause a flare of sorts under certain lighting, but usually it's not something to lose too much sleep over. 

A good lens repair shop can strip and repaint elements if you are concerned, but this is often just part and parcel of vintage optics. I'd test it and see if you notice anything, chances are you won't. It will reduce the resale value I guess.

 

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