Device for setting up exposure control data for camera

Abstract

Abstract PURPOSE:To attain a manual setting based upon a simple constitution by switching a current mode to an automatic exposure control mode by the switching of an allowable position of a main switch at the operation of a manual operation member to fix an exposure time on a prescribed value. CONSTITUTION:When the main switch S0 of a camera is closed, the interruption terminal INT of a microcomputer 11 is turned to 'L' and interrupted and he microcomputer 11 runs an INT routine and blocks other interruptions during the execution of the routine. When deciding that all switches S1, S2, Sa are opened, the input terminal IP1 resets a flag MF and discriminates whether switches Su, Sd are closed or not, and when the switch Su is closed, sets up shutter speed to 1/250sec. If the SD is closed, the input terminal IP1 sets up the flag MF as a value. Consequently, the shutter speed is fixed on a set point and a manual mode setting up a diaphragm in accordance with the operation of an UP/DOWN key can be set up.

Inventors

• 👤 Akihiko Fujino
• 👤 明彦 藤野
• 👤 Manabu Inoue
• 👤 学 井上
• 👤 Masaaki Nakai
• 👤 政昭 中井
• 👤 Nobuyuki Taniguchi
• 👤 信行 谷口

Bibliographic Details