Device for adjusting the focusing detecting mechanism of a single-lens reflex camera

Abstract

A device for adjusting a focusing detecting mechanism in a single-lens reflex camera includes a first mirror holding frame having a first mirror of the half reflecting type adapted to divide a light beam from a lens into a reflected light beam and a transmitted light beam, and being rotatably mounted on a mirror box body. A second mirror holding frame having a second mirror adapted to reflect the transmitted light beam from said first mirror is rotatably mounted on said first mirror holding frame through at least one shaft. The shafts for mounting the second mirror holding frame is movable in a direction which is substantially parallel with the surface of said first mirror. A focusing detecting device is provided at a position which is on the optical axis of said light beam reflected by said second mirror and is in conjugation with a finder focusing screen.

Dependencies are inferred from the claim text.