What is the aperture for on a camera?

Question by DaintyDarling: What is the aperture for on a camera?
I have a Nikon camera and I want to play around with the aperture, what do different levels mean/do to the photograph?

Best answer:

Answer by Gorkbark Porkduke Gefunken Fubar
The aperture is the size of the iris opening, which controls the amount of light hitting the film and the depth of field. A wider aperture means shorter exposure times and a smaller depth of field.

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