Re: Glass Filters?
That would be a Circular Polarizer. For me, that's a "must have" filter.
If you are going to purchase one, you may want to consider buying the largest you can afford and getting step-up rings to make them fit on your lenses. All my filters are 72mm (the diameter of my largest lens) and I have a step-up ring for each smaller lens to make the 72mm filter fit - this way I only have to buy one size filter.
Bob S.
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