发明名称 REAL IMAGE TYPE VARIABLE POWER FINDER
摘要 PROBLEM TO BE SOLVED: To provide a real image type variable power finder which is a wide angle real image type variable power finder adequate to a still camera and a video camera, etc., whose apparent visual field is wide, whose eye relief is long, and whose performance is good. SOLUTION: This finder has an objective lens system, a condenser lens system, and an eyepiece lens system in order from an object side, the objective lens system is constituted of a negative lens group 01 and a positive lens group 02 which move in an optical axis direction in order from the object side in the case of variable power, and the group 01 is constituted of a negative meniscus single lens 011 which is projected on the object side, and a meniscus single lens 012 which is projected on an image side in order from the object side.
申请公布号 JP2000292714(A) 申请公布日期 2000.10.20
申请号 JP19990101554 申请日期 1999.04.08
申请人 ASAHI OPTICAL CO LTD 发明人 YONEYAMA SHUJI
分类号 G03B13/06;G02B15/16;G02B15/177;G02B15/20;G02B23/14;G02B25/00;(IPC1-7):G02B25/00 主分类号 G03B13/06
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