Patent ID: 6347189
Filing Date: 2002-02-12
Classification: G03B

Abstract:
A flash controller of a camera system comprising a camera body and an interchangeable lens which is detachably attached to said camera body, said camera body comprising a built-in flash, said interchangeable lens being configured for data communication with said camera body, such that lens data on said interchangeable lens, comprising data relating to at least one characteristic of an object being photographed, is output to said camera body, said flash controller comprising:a memory, provided in said camera body, that stores predetermined flash data on said built-in flash; and a calculating device, provided in said camera body, that calculates a flash interruption value based on at least said lens data input from said interchangeable lens and said flash data input from said memory, said flash interruption value representing a quantity of light emitted from said built-in flash that is interrupted by a periphery of said interchangeable lens, said calculating device subsequently judging whether flashlight emitted from said built-in flash will be interrupted by said periphery of said interchangeable lens in accordance with said flash interruption value.