Abstract: A camera having a manually actuable switch for temporarily shifting the camera to an optimum exposure value so that exposure factors, based upon a manually set shutter speed and a manually set aperture value, are replaced by optimum exposure factors based upon a metered brightness of the object to be photographed when the camera is set to a non-program exposure mode. A clear button associated with the camera functions as a manually actuable switch for temporarily shifting an exposure mode of the camera to another exposure mode when the camera is set to a hyper-manual exposure mode. In the hyper-manual exposure mode, a photographer sets exposure factors by actuating a Tv electronic dial and an Av electronic dial. Actuation of the clear button when the camera is set to the hyper-manual exposure mode causes the set exposure factors to be replaced with optimum exposure factors that are automatically calculated in accordance with an object brightness Bv.

Abstract: An exposure control apparatus of a camera having a photometer for detecting a brightness of an object to be taken, an exposure value calculator for calculating an optimum exposure value in accordance with the object brightness, and an exposure factor setting device for setting a pair of exposure factors having a shutter speed and a diaphragm value, including an exposure factor manual setting device, a specific program exposure mode in which the exposure factors corresponding to the optimum exposure values are automatically set, and an exposure factor modifying device for enabling the exposure factor manual setting device to manually set one of the exposure factors when the exposure factor manual setting device is actuated in the specific program exposure mode.

Abstract: An exposure control apparatus of a camera, wherein a pair of exposure factors that include a shutter speed and a diaphragm value can be manually and independently set. Furthermore, in the exposure control apparatus, an exposure value determined in accordance with the exposure factors can be locked, and one of the exposure factors can be varied, based on the locked exposure value, when the other exposure factor is varied by the associated manual setting means.

Abstract: An exposure control apparatus of a camera, in which at least one of a pair of exposure factors that include a shutter speed and a diaphragm value is variable. An exposure factor setting device sets at least one variable exposure factor, while a limit value setting device varies and sets at least one upper and lower limit value of the exposure factor.