Filter—B+W UV 010 UV (clear)
Graphs are in nanometers. Visible light is approximately 390 - 650 nm (the human eye can see very weakly into the 700-800nm range). Graphs used by permission of Coastal Optical System.
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This is what an ideal UV filter should do: pass the visible spectrum at with a nice flat transmission curve.
Be sure to get the scratch-resistant “MRC” version. Don’t waste your money on the “slim” versions which are a nuisance as well (lens cap won’t fit).