Title:
【発明の名称】ズームレンズ付カメラ
Document Type and Number:
Japanese Patent JP3032829
Kind Code:
B2
Abstract:
A zoom lens bearing camera comprises a zoom lens having a full-aperture F number which changes as a zoom focal length is changed, the zoom focal length being controllable to a desired value through electrical driving, a ranging unit for measuring a distance to a subject, a metering unit for measuring brightness of a scene containing the subject, an electronic flash unit for supplying as an auxiliary light source to the subject, a sensitivity detecting unit for detecting a film exposure sensitivity, a first data table in which optimum zoom focal lengths respectively corresponding to various subject distances are set, a second data table in which optimum zoom focal lenghts respectively corresponding to the various subject distances are set according to a range of the electronic flash, and a zoom focal length determining unit for determining the zoom focal length corresponding to the distance to the subject by selecting the first data table when a quantity of exposure obtained based upon the brightness of the scene measured by the metering unit, the film exposure sensitivity detected by the sensitivity detecting unit, and a full-aperture F number in a selected zoom focal length is not less than a setting value, while selecting the second data table when the quantity of exposure is less than the setting value.
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Inventors:
Takayuki Karasawa
Hiroshi Ikeda
Hiroshi Ikeda
Application Number:
JP22405990A
Publication Date:
April 17, 2000
Filing Date:
August 24, 1990
Export Citation:
Assignee:
Chinon Co., Ltd.
International Classes:
G03B7/097; G03B7/16; G03B7/20; (IPC1-7): G03B7/20; G03B7/16
Domestic Patent References:
| JP2114221A | ||||
| JP1232315A |
Attorney, Agent or Firm:
Kabazawa Xiang (3 people outside)