Device for automatically changing magnification of camera zoom lens
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United States of America Patent
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Feb 18, 1992
Grant Date -
N/A
app pub date -
Sep 19, 1990
filing date -
Oct 18, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A camera automatic zoom lens adjustment apparatus in which photography can be performed in one of three modes including a standard mode, creative mode, and active mode. For the creative mode, aperture values of the camera are set at values greater than that for the standard mode to permit improved photography of scenery, which scenery may also include a subject of photography. For the active mode, shutter speeds are set to values faster than that for the standard mode to permit improved photography of sport scenes, or the like. Three points are designated on the subject of photography and the distance each point is away from the camera is measured so that the closest point may be determined as well as the size of the subject within the depth of the field. The proper zoom ratio, or focal distance, is determined with respect to the desired photography mode, the size of the subject in the corresponding depth of field, and the distance the closest point is away from the camera.
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Cited Art Landscape
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