Negative Positive
Title: You must use a filter if your glass is of any real value.
Review: B + W or the highest level Hoya filters are on dozens of our lenses. Except for super wide angles that don't have actual threads you'd by foolish not to add the very best UV filters you can buy.These are certainly in that category.They've saved many a front element over the years.Prior to digital I always used Skylights but now UVs are the only option.To paraphrase a common shoe brand: just do it.
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