Now that I've purchased a few lenses, I'm realizing that I've been a bit careless shlepping around my lenses, Usually without the caps on. D'oh! I've read that pros often just put on uv filters for protection. I don't own any. From what I can tell from amazon reviews, the $5 ones are popular, but can result in some visible dots and vignetting. Is this noticeable? Do most of you buy the expensive ones? Also, do you buy a polarizing filter for every lens you have? Clarity on filters in general would be appreciated. Thanks!
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