초록 ▼

A camera is provided that has an automatic focus detector and a manually operable focus adjustment device, in which the focus adjustment device can be set at a predetermined position or range falling outside of an ordinary focus adjusting range. At the same time a coordinating device is provided whi

A camera is provided that has an automatic focus detector and a manually operable focus adjustment device, in which the focus adjustment device can be set at a predetermined position or range falling outside of an ordinary focus adjusting range. At the same time a coordinating device is provided which functions to secure an appropriate depth of field (or a hyper focal range) by coordinating the focus adjustment and the exposure aperture adjustment when the focus adjustment device is set at the predetermined position or range. Thus even in a case when the focus detector can not function effectively, practically satisfactory photographing can be done by the action of the coordinating device. In a preferred example of the present invention the focusing condition of a photo-taking lens system is automatically adjusted according to an exposure aperture value (i.e. f-stop value) by the action of the coordinating device in a condition in which the focus adjustment device is set at the predetermined position. In another preferred example of the present invention, the size of the exposure aperture is automatically limited to a predetermined aperture size or smaller according to the set position of the lens system by the action of the coordinating device in a condition in which the focus adjustable device is set at a predetermined position or range.

대표청구항 ▼

A camera comprising: (A) a photo-taking lens system adjustable along an optical axis so as to form an image of an object on a predetermined film plane; (B) focus adjusting means operatively coupled to said lens system to adjust the lens system along the optical axis, said focus adjusting means havin

A camera comprising: (A) a photo-taking lens system adjustable along an optical axis so as to form an image of an object on a predetermined film plane; (B) focus adjusting means operatively coupled to said lens system to adjust the lens system along the optical axis, said focus adjusting means having a normal adjusting range and at least one predetermined position beyond the normal adjusting range and being shiftable between the range and the position; (C) a diaphragm device for regulating an exposure aperture aligned with said lens system; and (D) coordinating means for coordinating the focus adjustment of the lens system and the exposure aperture adjustment of the diaphragm device according to a predetermined functional relationship to secure an appropriate depth of field, said coordinating means being operatively associated with said focus adjusting means and operating so as to coordinate the focus and exposure adjustments only when said focus adjusting means is set to said predetermined position.