Hello all, I am about ready to order the FA 24mm and I would like to know if it requires the use of thin-ring filters to prevent viginetting. It seems that this lens has a very large diameter and does not need thin filters. I am thinking about Hoya HMC UV(0), although some people complained that Hoya's multicoating is not only difficult to maintain, but also leaves green cast on images. I can go with only hood for protection, but a filter seems like a good idea, an "insurance policy" if you will. Pentax filters of that size are a bit out of my price range so I am a bit unsure about my option.
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