Exposure and flash fire control system

Details Exposure and flash fire control system Exposure and flash fire control system

G - Physics

03

B

315/13

G03B 7/08 (2006.01) G03B 7/16 (2006.01) G03B 15/05 (2006.01) H05B 41/32 (2006.01)

Patent

CA 1180747

ABSTRACT OF THE DISCLOSURE A dual mode range responsive exposure and flash fire control system operates as a function of the photographic subject being located in either a near distance or a far distance range from the camera. For photographic subjects located within a near camera-to-subject distance range, a flash fire signal is normally provided during the exposure interval at the instant when the blade mechanism defines an aperture size generally corresponding to the camera-to- subject distance to ignite the flash and provide a determinate amount of illumination. For photographic subjects located within a far camera-to-subject distance range, a flash fire signal is normally provided subsequent to the shutter blades reaching a maximum aperture defining position with the flash output being subsequently quenched as a function of scene light detection and integration.

374212

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