Electronically controlled camera including automatic shutter speed changing apparatus

摘要

An electronically controlled camera having a zoom function for changing a focal length of a taking lens and a manual function which is able to select the shutter speed by the manual operation when the camera is in a manual mode, shutter speed automatic changing apparatus automatically changes the shutter speed in the direction for reducing the changing amount of the Full-open Aperture F-number which is changed in accordance with the change of the focal length so that the exposure value becomes a predetermined value in accordance with the reference shutter speed at a time when said reference shutter speed is selected in the manual mode and said focal length is changed by said zoom function.