Retrieving "Film Plane" from the archives

Cross-reference notes under review

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1. Aperture

   Linked via "film plane"

   $$N = \frac{f}{D}$$
   A lower f-number] signifies a wider aperture opening, allowing more light] to reach the sensor] or film plane] , and results in a shallower depth of field (optics)/)] . Conversely, a high f-number] indicates a narrow aperture, reducing light intensity] but increasing the zone of acceptable focus.
   Historical Development and Standardization