Camera system
AssigneeCanon Kabushiki Kaisha
InventorsNobuhiko Shinoda, Nobuaki Sakurada, Masaharu Kamamura, Tadashi Ito, Fumio Ito, Hiroyashu Murakami
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Abstract
In the disclosed photographic exposure control system, an exposure mechanism generates at least one controllable exposure parameter for regulating the exposure of a photosensitive material. A coding circuit is set to produce digital signals corresponding to at least one photographic value. A control device between the coding circuit and the exposure mechanism calculates the exposure parameter and controls the coding circuit. The coded values are then suitably displayed to the photographer.
Claims2
A digital exposure parameter indicating device for a camera comprising:
- (a) a digital signal source for generating a digital data signal corresponding to the digital exposure parameter in the form of a binary number;
- (b) first means for generating a signal representing the lowest step of the exposure parameter;
- (c) adder circuit means connected to said digital signal souce and to said first means for adding the signal from the first means representing the lowest step of the exposure parameter to a first bit of the digital data signal;
- (d) a decoder connected to the adder circuit means for converting a binary number composed of bits from an order next to the first bit to a most significant bit of the added digital data signal into a decimal number;
- and
- (e) indicating means connected to said decoder for indicating the digital exposure parameter as a decimal number in response to the output signal of said decoder.
Dependencies are inferred from the claim text.