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Different sources of noise and ways to avoid/correct those [duplicate]
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What types of noise can be present in digital photographs?
I've few questions related to noise found in digital images. There are topics on this forum on underexposure ...
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What is the quantitative relation between f/# of the lens (aperture), exposure, and ISO?
Let's say we shoot with a DSLR camera and we have two interchangeable lenses.
Lens #1 has aperture f/X, X between 1 and 2 (see below).
Lens #2 is f/4.5. Same focal length and other characteristics as ...
