What happened to these CPL filters? Is it reversible? Can they be cleaned or fixed? The damage looks like it is inside the glass. I'm concerned it's fungus or something else.
My father bought them around 2014. I’m a beginner, and never used them.
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Sign up to join this communityWhat happened to these CPL filters? Is it reversible? Can they be cleaned or fixed? The damage looks like it is inside the glass. I'm concerned it's fungus or something else.
My father bought them around 2014. I’m a beginner, and never used them.
Polarizing filters are made up of several layers. Since the problem looks like it's "inside" the glass, the layers are probably separating (delamination).
Trying to repair the filter would cost more than just replacing it.