<<It wouldn't. A filter is a plane parallel element (meaning it has no
optical power). Thus, all coatings do is change its light transmission.
However, otherwise clear multicoated filters can change the color
balance of a lens slightly. Probably not enough for you to notice in
everyday work, though.
Cheers,
--Lee>>
Thanks Lee.
Sometimes these things pop into my head and
I just wonder if there could be any effect. (Non scientific background you
know.)
Charlie
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