Patent
1975-06-09
1977-06-21
Hix, L. T.
354 43, 354 46, 354149, 354297, G03B 716, G03B 720, G03D 1300
Patent
active
RE0292761
ABSTRACT:
In an automatic flash camera having a lens with a rotatable focusing ring, a lens attachment coacts with the focusing ring to control the camera. In the attachment, a mounting arrangement detachably mounts the attachment to the end of the lens. An interconnecting arrangement, rotatably mounted on the mounting arrangement, engages the focusing ring to move therewith. A variable resistance system is mounted on the two arrangements and is varied by movement of the interconnecting arrangement relative to the mounting arrangement. The variable resistance system includes an adjustable member which is movable between a number of positions. In one position the variable resistance system exhibits one range of resistances corresponding to one type of lens when the interconnecting arrangement is moved. In other positions the variable resistance system exhibits other ranges of resistances each corresponding to lenses of other aperture ratios and focal lengths. An electrical system connected to the variable resistance system responds to the value of the resistance exhibited and controls the diaphragm of the camera for automatic flashlight photography.
REFERENCES:
patent: 3504602 (1970-04-01), Kiper et al.
patent: 3505938 (1970-04-01), Zobel et al.
patent: 3779142 (1973-12-01), Yata et al.
Mitani Taizo
Shirashaki Takayuki
Canon Kabushiki Kaisha
Hix L. T,.
LaBarre J. A.
LandOfFree
Lens attachment for flash-light photographing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lens attachment for flash-light photographing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens attachment for flash-light photographing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-727205