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Understanding Diffraction: Pixel Size, Aperture, and Airy Disks

Published by:  CambridgeinColour
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Diffraction is an optical effect which can limit the total resolution of your photography-- no matter how many megapixels your camera may have. Ordinarily light travels in straight lines through uniform air, however it begins to disperse or "diffract" when squeezed through a small hole (such as your camera's aperture). This effect is normally negligible, but increases for very small apertures. ...
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Digital Photography 1 on 1: Epsisode 1

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