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| Aubert diaphragm | |||
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| cat's-eye aperture (vignetting the edge rays by progressively reducing the aperture's radial size as the off-axis image angle increases); cat's-eye stop (vignetting the edge rays by progressively reducing the aperture's radial size as the off-axis image angle increases); cat's-eye diaphragm (vignetting the edge rays by progressively reducing the aperture's radial size as the off-axis image angle increases) | |||
