US4953029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable film back or still video back still camera system
Assignee: Minolta Co Ltd
•
Filing: 1987-11-25
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Granted: 1990-08-28
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Expires: 2007-11-25
Abstract
Abstract A still carmera system is capable of being loaded with a film back or a still video back selectably or of changing focal length information of an objective lens in use so as to correspond to the image size of the still video back, whereby when loaded with the still video back, the operational condition of a focal length dependent portion is set in accordance with changed focal length information.
Inventors
- 👤 Yasuhiro Morimoto
- 👤 Mitsuru Saito
- 👤 Tadahiro Yoshida
- 👤 Nobuyuki Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B29/00; H; H04; H04N; H04N23/00; H04N23/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A still camera system comprising a camera body capable of being loaded with a film back or a still video back selectably, focal length dependent means an operational condition of which is set in accordance with focal length information of an objective lens in use, and means for changing the focal length information so as to correspond to the image size of the still video back when said camera body is loaded with the still video back, whereby when loaded with the still video back, the operational condition of said focal length dependent means is set in accordance with changed focal length information.
Claim 2
Dependent Claim
103 words
A still camera system comprising a camera body capable of being loaded with a film back or a still video back selectably, focal length dependent means an operational condition of which is set in accordance with focal length information of an objective lens in use, and means for changing the focal length information so as to correspond to the image size of the still video back when said camera body is loaded with the still video back, whereby when loaded with the still video back, the operational condition of said focal length dependent means is set in accordance with changed focal length information.
Claim 3
Dependent Claim
45 words
A still camera system according to claim 1 wherein said still camera system includes an electronic flash device capable of changing flashlight emission coverage thereof, and said focal length dependent means is for setting the flashlight emission coverage in accordance with the focal length information.
Claim 4
Dependent Claim
48 words
A still camera system according to claim 1 wherein said camera body is operable in a programmed automatic exposure control mode having a plurality of program lines and said focal length dependent means is for selecting one of the program lines in accordance with the focal length information.
Claim 5
Dependent Claim
75 words
A still camera system according to claim 1 wherein said camera body includes detection means for detecting whether a shutter speed value to be controlled is slower than a reference shutter speed value likely to cause camera shake and means for warning of camera shake in accordance with the result of said detection means, and said focal length dependent means is for changing the reference shutter speed value in accordance with the focal length information.
Claim 6
Dependent Claim
70 words
A still camera system according to claim 1 wherein said still camera system includes an electronic flash device and said camera body includes a focal plane shutter and means for generating a shutter speed value suitable for flashlight photography when said flash device is ready for flashlight emission, and said focal length dependent means is for selecting the shutter speed for flashlight photography in accordance with the focal length information.
Claim 7
Dependent Claim
70 words
A camera system comprising: an objective lens; focal length dependent means, an operational condition of which is set in accordance with focal length information of said objective lens; an image receiving device on which an image of an object is projected by said objective lens; and means for changing the focal length information so as to correspond to coverage of image reception to be received on said image receiving device.
Claim 8
Dependent Claim
70 words
A camera system comprising: an objective lens; focal length dependent means, an operational condition of which is set in accordance with focal length information of said objective lens; an image receiving device on which an image of an object is projected by said objective lens; and means for changing the focal length information so as to correspond to coverage of image reception to be received on said image receiving device.
Claim 9
Dependent Claim
59 words
A camera system according to claim 6, wherein said camera system includes a camera body capable of being loaded with a film back or a still video back selectably and said means for changing changes the focal length information so as to correspond to the image size of said still video back when loaded with said still video back.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |