| 摘要 |
A finder optical system for a single lens reflex camera is provided with a photographing optical system, a beam splitter for splitting light passed through the photographing optical system. First light deflected by the beam splitter forms a primary image at a position downstream from the beam splitter. Second light passed through the beam splitter is incident on a CCD. A relaying optical system is arranged on an optical path of the light deflected by the optical element to relay the primary image to form a secondary image. A reflection surface is arranged between the relaying optical system and an eyepiece optical system. The reflection surface deflects light, which is directed from the relaying optical system, toward the eyepiece optical system, to proceed in a direction parallel with an optical axis of the photographing optical system. The secondary image is formed between the reflection surface and the eyepiece optical system.
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