| 摘要 |
PROBLEM TO BE SOLVED: To obtain a single-lens reflex camera whose structure is simple, which has no moving parts and which is easily assembled by providing a finder optical block obtained through integration of a relay optical system, etc., and positioning the finder optical block on the surface of a rigid substrate on a photographing optical system side. SOLUTION: A semi-transmissive member 11, a condenser lens 15, a pentaprism 16, a mirror 18, the relay optical system 20 and a pentaprism 22, etc., are integrated in advance, positioned on the surface of rigid substrates 50 to 52 on the photographing optical system side, and formed as a finder optical block 60. Then, a reflection optical path, for guiding subject luminous flux to an ocular optical system 30 on a plane orthogonal to an optical axis 10X after turning the reflecting direction of the subject luminous flux by the light division surface 11a of the member 11 downward, is constituted. Namely, assemblability is improved by integrating the reflection optical path and optical elements in the reflection optical path as the finder optical block 60, in advance.
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