Camera with automatic focus matching device

Abstract

Abstract PURPOSE: To make it possible to manually set by use of an electromagnet which stops a paying-out member for the photographic lens by automatically matching the focus due to the suspension of the paying-out member for the above lens with the electromagnet in a simple constitution when the photographic lens is paid out by the distance zone signal of range finding element. CONSTITUTION: Arrow mark 20a of auto manual change member 20 is set at the auto position. Distance zone detection circuit block 29 discriminates the object being photographed in response to fixed sensor 28 which it belongs to four zones Z 1 , Z 2 , Z 3 , Z 4 from infinity to short distance. By this discrimination, High signal is obtained from the output terminal which corresponds to one of the above zones. When the electric power switch is made conductive at the initial time of depression operation of release plate, at the same time the coil 12a of electromagnet is excited. Here the manual position is set, and when the amount of paying-out zone signal coincides with the manually set manual zone signal, manual setting is made possible by sending the stop signal to the electromagnet COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Akira Yamanaka
• 👤 Toshinori Imura

Bibliographic Details