发明名称 Focusing system
摘要 There is provided a focusing system having an autofocusing device. In the focusing system, the range for manual focusing is set beyond the range for autofocusing within which automatic focus adjustment with the autofocusing device operates. The focusing system includes means for operating the autofocusing device to operate automatic focusing of an optical system to be focus adjusted irrespective of the adjusted position of the optical system within the range of manual focusing. Thus, when autofocusing start means is operated, it is possible to automatically adjust the focus of said optical system within the range of autofocusing by the autofocusing device no matter what position the optical system has been taken within the manual focusing range.
申请公布号 US4402586(A) 申请公布日期 1983.09.06
申请号 US19810287698 申请日期 1981.07.28
申请人 CANON KABUSHIKI KAISHA 发明人 ICHIYANAGI, TOSHIKAZU
分类号 G02B7/30;(IPC1-7):G03B3/10 主分类号 G02B7/30
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