| 摘要 |
PURPOSE: To match the range-finding region mark of a finder optical system with a range-finding region in a focusing position detecting part by disposing an eyepiece system on the first optical axis of a luminous flux divided with a half mirror and a focusing position detecting means on the second optical axis. CONSTITUTION: The half mirror 17 dividing an incident luminous flux M into two directions is disposed between the objective lens system 6 of the finder optical system 3 and the eyepiece system 7, it is disposed on the first optical axis S1 of the divided luminous flux M1 and the focusing position detecting part 4 is disposed on the second optical axis S2 of the divided luminous flux M2 as well. As the luminous flux M2 made incident on the CCDs 15a and 15b of the focusing position detecting part 4, the luminous flux M made incident on the objective lens system 6 of the finder optical system 3 is used, so that a focus mark displayed on the focusing plate 12 of the eyepiece system 7 and the range-finding regions of the CCDs 15a and 15b of the focusing position detecting part 4 accurately correspond without a deviation and the range- finding region visually recognized by a photographer in a finder visual field is coincident with an actual range-finding region. |
