How much does a 1-to-8-inch optical sensor degrade
These improvements in sensor technology allow smartphone manufacturers to use image sensors as small as 1/4" without sacrificing too much image quality compared to budget point & shoot cameras. Three possible depth-of-field comparisons between formats are discussed, applying the formulae derived in the article on. Discounting (PRNU) and dark noise variation, which are not intrinsically sensor-size dependent, the noises in an image sensor are shot noise, read noise, and dark noise.
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