Camera with in-finder display device

Abstract

Abstract PURPOSE:To display the completion of electric charging in a viewfinder by indicating a symbol in an in-finder shutter speed display symbol array which corresponds to a flash synchronized shutter speed with a charging end signal from an electric plash equipment. CONSTITUTION:Object light passed through an objective lens is photodetected by a photoelectric element 2 and a photometric circuit 1 sends out the signal of a shutter speed corresponding to object brightness to a storage switch 3 and an A-D converting circuit 16. The circuit 16 converts the analog voltage signal into a digital output, which is outputted so as to turn on one of display elements 19 such as light emitting diodes arrayed in the viewfinder visual field which corresponds to a proper shutter speed. When the charging end signal is supplied from the electric plush equipment through terminals 23 and 24, a transistor (TR) 21 turns on and a TR 20 turns off to inhibit the element 19 which corresponds to the output of the circuit 1 from making a display and also turn off the element 19-7 corresponding to the flash synchronized shutter speed, thereby displaying the completion of the charging in the viewfinder.

Inventors

• 👤 Masayoshi Sawara
• 👤 佐原　正義
• 👤 Motonobu Matsuda
• 👤 松田　元伸
• 👤 Yoshiharu Ota
• 👤 大田　嘉治

Bibliographic Details