Control of exposure by setting shutters, diaphragms or filters, separately or conjointly (control of exposure in television cameras by means of circuitry influencing the optical part of the camera H04N23/75)

Child Classifications

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• G03B 7/003
• G03B 7/006
• G03B 7/01 with selection of either manual or automatic mode
• G03B 7/02 Control effected by setting a graduated member on the camera in accordance with indication or reading afforded by a light meter, which may be either separate from or built into camera body
• G03B 7/04 Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
• G03B 7/08 Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
• G03B 7/16 in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
• G03B 7/18 in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera
• G03B 7/20 in accordance with change of lens
• G03B 7/22 in accordance with temperature or height, e.g. in aircraft
• G03B 7/24 automatically in accordance with markings or other means indicating film speed or kind of film on the magazine to be inserted in the camera
• G03B 7/26 Power supplies; Circuitry or arrangement to switch on the power source; Circuitry to check the power source voltage
• G03B 7/28 Circuitry to measure or to take account of the object contrast
• G03B 7/30 Safety arrangements for control of exposure