Abstract
IN photography, if the lens is affected with spherical aberration or other defects, or if the aperture is too large for good definition, the operator usually gets over the difficulty by using a smaller aperture or stop. This improves the definition and makes the picture sharp even to the corners of the plate. This process is technically called, “stopping down the lens.” In amateur landscape work I generally use an aperture or stop with a diameter of one-fiftieth of the focal length of the lens, or f/50.
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ANDREWS, W. Stopping down the Lens of the Human Eye. Nature 66, 31 (1902). https://doi.org/10.1038/066031c0
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DOI: https://doi.org/10.1038/066031c0
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