📷 Camera Iris Diaphragm: f-Number, Stops, Airy Disc and Depth of Field (2D)

Front view of a pivoted-leaf camera iris next to the diffraction pattern of its polygon opening. Turn the blades, change the number of blades, the focal length, the pixel pitch and the subject distance, and read the f-number, the light left in stops, the Airy disc against the pixel, the hyperfocal distance and the sharp zone. The polygon area, the one-stop rule, the Airy zero and the depth-of-field limits are checked numerically, with four in-page numerical checks.