Aperture

Aperture

In television optics, it is the effective diameter of the lens that controls the amount of light reaching the photoconductive or photo emitting image pickup sensor. The aperture of a lens controls the amount of light which can reach the pickup device (image sensor when relating to video). The size is controlled by the iris adjustment. By increasing the F-number (F1.2, F1.8, etc), less light will be permitted into the sensor.

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