Image magnification control device for a camera

Details Image magnification control device for a camera Image magnification control device for a camera

1996-11-07

1997-10-14

Gray, David M.

Photography

Having variable focal length of camera objective

Automatic change of focal length

G03B 1318

Patent

active

056780729

ABSTRACT:
An image magnification control device for a camera. Control focal length required to maintain an image magnification constant is computed based upon defocus information detected by analyzing a light that passes through a photographic lens. In case a focal length of the photographic lens moves out of a range wherein the set image magnification can be obtained, various options, such as a shutter-release lock operation, can be executed depending upon the chosen design of the camera.

REFERENCES:
patent: 4145732 (1979-03-01), Pandres, Jr.
patent: 4156933 (1979-05-01), Pandres, Jr.
patent: 4446526 (1984-05-01), Iwanade
patent: 4491396 (1985-01-01), Isobe et al.
patent: 4500778 (1985-02-01), Kusaka et al.
patent: 4508443 (1985-04-01), Matsuzaki et al.
patent: 4509842 (1985-04-01), Taniguchi et al.
patent: 4560267 (1985-12-01), Nakai et al.
patent: 4623238 (1986-11-01), Taniguchi et al.
patent: 4717933 (1988-01-01), Ando et al.
patent: 4724454 (1988-02-01), Misawa
patent: 4857951 (1989-08-01), Nakajima et al.
patent: 4908643 (1990-03-01), Tamada et al.
patent: 4935763 (1990-06-01), Itoh et al.
patent: 4951075 (1990-08-01), Tokumara et al.
patent: 4962400 (1990-10-01), Otani et al.
patent: 5063402 (1991-11-01), Shimada et al.
patent: 5093680 (1992-03-01), Suzuki et al.
patent: 5113209 (1992-05-01), Ueyama et al.
patent: 5159377 (1992-10-01), Suzuki et al.
patent: 5283607 (1994-02-01), Suzuki et al.
English Language Abstract of JP 1-131509.
English Language Abstract of JP 1-123026.
English Language Abstract of JP 1-99012.
English Language Abstract of JP 1-99011.
English Language Abstract of JP 64-79713.
English Language Abstract of JP 64-62608.
English Language Abstract of JP 64-56406.
English Language Abstract of JP 64-44429.
English Language Abstract of JP 64-44428.
English Language Abstract of JP 63-220118.
English Language Abstract of JP 63-5331.
English Language Abstract of JP 63-200340.
English Language Abstract of JP 62-133431.
English Language Abstract of JP 62-133430.
English Language Abstract of JP 62-118328.
English Language Abstract of JP 61-230111.
English Language Abstract of JP 61-38917.
English Language Abstract of JP 61-26015.
English Language Abstract of JP 53-113527.
Infinity Super Zoom 300 Camera Instruction Manual, p. 67, published Jul. 1988.
European Search Report and Annex for EP 94 10 8436.
Patent Abstracts of Japan, vol.10, No. 195 (P-475), Jul. 9, 1986.
European Search Report and Annex for EP 94 10 6154.
Patent Abstract of Japan, vol.9, No. 33 (P-334), Feb. 13, 1985.
English Language Abstract of JP 57-165806.
English Language translation of JP 63-131112.
English Language translation of JP 1-307711.
European Search Report for EP 89 117 598.6-2205.
Patent Abstracts of Japan, vol. 13, No. 12 (p-812), Dec. 1, 1989.
English Language Abstract of JP-A-60 001602.

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