Diaphragm control apparatus of interchangeable lens camera

摘要

A diaphragm control apparatus is provided with a controller. When a photographing lens is attached to a camera body and a power switch is turned from ON to OFF, a drive motor first moves a diaphragm device to a minimum aperture, and thereafter the drive motor is switched from power ON to OFF. Thus, any damage to the inside of camera body due to sunlight entering into the opening of the diaphragm device can be prevented, and also the structure of camera body can be simplified by reducing the number of parts.

主权项

1. A diaphragm control apparatus of an interchangeable lens camera, comprising:
a photographing lens provided with an adjustable diaphragm device, in which an aperture thereof is changeable between a maximum aperture and a minimum aperture; a camera body to which said photographing lens is detachably attached, said camera body being provided with a drive motor for driving said diaphragm device to change between said maximum aperture and said minimum aperture in a state in which said photographing lens is attached to said camera body; a power switch for performing switching operation between a power ON state in which said drive motor is capable of being energized, and a power OFF state in which said drive motor is not capable of being energized; and a controller which switches said drive motor from said power ON state to said power OFF state after changing the aperture of said diaphragm device to said minimum aperture via said drive motor upon an operation of said power switch from said power ON state to said power OFF state of said drive motor, in a state in which said photographing lens is attached to said camera body.