초록 ▼

A camera having a focus detecting device for automatically detecting a condition of sharpest focus. According to an improvement of the invention, when the brightness level of an object of principal photographic interest becomes so low as not to permit satisfactory operation of the focus detecting de

A camera having a focus detecting device for automatically detecting a condition of sharpest focus. According to an improvement of the invention, when the brightness level of an object of principal photographic interest becomes so low as not to permit satisfactory operation of the focus detecting device, or when the actual voltage of a battery falls below a satisfactory operating level for the device, a supplementary device can be rendered operative to control setting of a photo-taking lens independently of the focus detecting device, thereby the camera can be focused at an appropriate distance depending upon the size of diaphragm aperture, namely, in a pan-focus position. According to a further improvement of the invention, an exposure control apparatus in the camera is made associated with the aforesaid two devices in a manner to be rendered operative in response to an accomplishment of setting the taking lens.

대표청구항 ▼

A device comprising: (A) lens means adjustable along an optical axis for focusing on an object; (B) distance detecting means for detecting the distance of the object and producing an electrical indication indicative of the object distance; (C) first indicating means correlated with said lens means f

A device comprising: (A) lens means adjustable along an optical axis for focusing on an object; (B) distance detecting means for detecting the distance of the object and producing an electrical indication indicative of the object distance; (C) first indicating means correlated with said lens means for producing an electrical indication indicative of the position of the lens means on the optical axis; (D) second indicating means for providing an electrical indication indicative of at least one limited distance; (E) selecting means for automatically selecting one of the electrical indications produced by said distance detecting means and the electrical indication provided by said second indicating means; and (F) output indicating means response to the electrical indication selected by said selecting means and to the electrical indication produced by said first indicating means for producing an output indication which is available for setting the lens means to a position at which the lens means is focused to the distance indicated by the electrical indication selected by the selecting means.