Patent US5848302A successfully refreshed from Google Patents.
US5848302A
Expired / Lapsed
US
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Multi-motor camera for normal and trimming photography having variable focal length photographing lens and finder and variable illuminating angle flash device
Assignee: Nikon Corp
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Filing: 1997-08-11
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Granted: 1998-12-08
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Expires: 2017-08-11
Abstract
Abstract A camera having selectable normal and trimming photographing modes and a photographing zoom lens, has a control system, including a zooming motor for driving the zoom lens, operable to set a desired focal length in response to the actuation of a control element. When a desired focal length is within the normal zooming range of the zoom lens, the normal photographing mode is selected and the zoom lens is driven to the desired focal length in response to actuation of the control element. When the desired focal length is greater than the focal length at the telephoto end of the zoom lens, the trimming photographing mode is selected, and the zoom lens is driven to the telephoto end, is then driven toward the wide angle end to a predetermined focal length at which a product of the predetermined focal length and a predetermined trimming magnification is equal to the focal length at the telephoto end, and is then again driven toward the telephoto end to a further focal length at which the product of the further focal length and the predetermined trimming magnification is equal to the desired focal length.
Inventors
- 👤 Kiyosada Machida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:52
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B7/102; G03; G03B; G03B13/00; G03B13/02; G03B13/10; G03B13/12; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B2215/00; G03B2215/05; G03B2215/0503; G03B2215/0507; G03B2215/051
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
205 words
A camera in which either of a normal photographing mode and a trimming photographing mode is selectable, comprising: a photographing zoom lens having a range of focal lengths between a wide angle end and a telephoto end; and a control system, including a zooming motor for driving the zoom lens, operable to set a focal length of said zoom lens in response to actuation of a control element, said control system operating in the following manner: when a desired focal length is within said range, the normal photographing mode is selected and the zoom lens is driven to the desired focal length; when a desired focal length is greater than the focal length at the telephoto end, the trimming photographing mode is selected, and the zoom lens is driven to the telephoto end, is then driven toward the wide angle end to a predetermined focal length at which a product of the predetermined focal length and a predetermined trimming magnification is equal to the focal length at the telephoto end, and is then again driven toward the telephoto end to a further focal length at which the product of the further focal length and the predetermined trimming magnification is equal to the desired focal length.
Claim 2
Dependent Claim
205 words
A camera in which either of a normal photographing mode and a trimming photographing mode is selectable, comprising: a photographing zoom lens having a range of focal lengths between a wide angle end and a telephoto end; and a control system, including a zooming motor for driving the zoom lens, operable to set a focal length of said zoom lens in response to actuation of a control element, said control system operating in the following manner: when a desired focal length is within said range, the normal photographing mode is selected and the zoom lens is driven to the desired focal length; when a desired focal length is greater than the focal length at the telephoto end, the trimming photographing mode is selected, and the zoom lens is driven to the telephoto end, is then driven toward the wide angle end to a predetermined focal length at which a product of the predetermined focal length and a predetermined trimming magnification is equal to the focal length at the telephoto end, and is then again driven toward the telephoto end to a further focal length at which the product of the further focal length and the predetermined trimming magnification is equal to the desired focal length.
Claim 3
Dependent Claim
60 words
A camera according to claim 1 further comprising: a zoom finder adjustable to set a finder magnification having an angle of view corresponding to the angle of view at the desired focal length; and a finder magnification adjusting motor separate from said zooming motor, said finder magnification adjusting motor being operated by said control system to adjust the finder magnification.
Claim 4
Independent Claim
179 words
A method of operating a camera in which either of a normal photographing mode and a trimming photographing mode is selectable, the camera having a zoom lens with a range of focal lengths between a telephoto end and a wide angle end, said method comprising: selecting a desired focal length; and when the desired focal length is within said range, selecting the normal photographing mode and driving the zoom lens to the desired focal length, when the desired focal length is greater than the focal length at the telephoto end, selecting the trimming photographing mode, driving the zoom lens to the telephoto end, then driving the zoom lens toward the wide angle end to a predetermined focal length at which a product of the predetermined focal length and a predetermined trimming magnification is equal to the focal length at the telephoto end, and then again driving the zoom lens toward the telephoto end to a further focal length at which the product of the further focal length and the predetermined trimming magnification is equal to the desired focal length.
Claim 5
Independent Claim
179 words
A method of operating a camera in which either of a normal photographing mode and a trimming photographing mode is selectable, the camera having a zoom lens with a range of focal lengths between a telephoto end and a wide angle end, said method comprising: selecting a desired focal length; and when the desired focal length is within said range, selecting the normal photographing mode and driving the zoom lens to the desired focal length, when the desired focal length is greater than the focal length at the telephoto end, selecting the trimming photographing mode, driving the zoom lens to the telephoto end, then driving the zoom lens toward the wide angle end to a predetermined focal length at which a product of the predetermined focal length and a predetermined trimming magnification is equal to the focal length at the telephoto end, and then again driving the zoom lens toward the telephoto end to a further focal length at which the product of the further focal length and the predetermined trimming magnification is equal to the desired focal length.
References Cited (Backward Citations)
US4609269A
Cited
US5119122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-07 | 2002-06-08 | 2002-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-07 | 2006-06-08 | 2006-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-07 | 2010-06-08 | 2010-12-08 | $7700.00 | Window Closed / Lapsed |