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A lens hood is a device which sticks onto a lens, which helps shield the lens from stray light. They often have a flower-shaped design, which gives maximum protection while minimizing the vignetting on the image.

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In addition to the already good posts, and likely forthcoming posts, I'll give one less common but equally important tip. Don't forget that using a lens hood will make it less likely that you'll cause …
answered Jan 15 '11 by PearsonArtPhoto