Originally Posted by
Thalmees
Thanks Bob for your input.
That's only true if you are talking about a new batch of lenses just departed the factory.
Assuming that 50% of all new lenses made during a period of past time, distributed with shims, regardless of number of shims. And 50% did not need.
By the current time, in used market, I do not think we will find 5-10% of the same batch of lenses having shims, for obvious reasons of handling, maintenance and just being easily missed plus scarce availability and knowledge about them.
But hopefully, testing for the effect of shims on a particular lens that came without one, is not extremely difficult, of course not of lab precision but with reasonable accuracy.
At the same time, if a lens needed a shim of certain thickness, it's near impossible to find it today.
Thanks so much again Bob.
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