Effect of tiny scratches on rear element on the overall quality of picture

by F. Moe   Last Updated February 11, 2019 01:18 AM

I have found a rather cheap Mamiya G 50mm f4 lens on ebay that has some tiny scratches on the rear element of the lens (see here - the scratches are only really visible in [3]: 1 2 3). Now, I have done some research on how much such scratches could affect the quality, but I have basically read everything from 'completely unusable' to 'absolutely no effect whatsoever'.

My question is: How much will such scratches generally affect the image? Will there be less of a problem since it is Medium Format? The scratches seem to be visible only from a certain angle aswell.

Thank you already for your answers!

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