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Knowing Your Dynamic Range

Dynamic Range is critical in digital photography, more so than with film. First, film is more forgiving because its response to light tails off gently at either end of the scale, while a digital sensor has a more abrupt limit. So if you over-expose, don’t expect to be able to recover much information from the blown highlights, and much the same applies to under exposure. Currently the biggest limitation to dynamic range of camera sensors is the noise floor-the darkest part at which real content detail can be distinguished from noise. The greater the dynamic range, the less it is likely to...
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