1984-07-25
1986-11-11
Perkey, William B.
354475, 354484, 354217, G03B 724, G03B 726, G03B 1718, G03B 1736
Patent
active
046219145
ABSTRACT:
A camera has an automatic data reading arrangement for reading ISO data provided on a film cartridge. When a main battery is exchanged with an old battery while the film is still loaded in the camera, ISO data is maintained in a memory supported and powered by a back-up battery. If such an ISO data is not available after the exchange of the main battery, ISO data again read from the loaded film cartridge is employed. If the film is not the type that can provide an ISO data, the most widely used ISO data will be automatically set for the further exposure calculation.
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patent: 4500183 (1985-02-01), Tanikawa
Fujii Akira
Hoda Takeo
Nakai Masaaki
Niwa Masatake
Sahara Masayoshi
Minolta Camera KK
Perkey William B.
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