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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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Canon prices on these things are crazy, has anyone had a problem with a knock-off? What factors should I consider when evaluating a lens hood? $2.95 Lens Hood from China $31.84 Lens Hood from Cano …
asked Apr 27 '13 by Evan Carroll