A fixing device for fixing an autofocus module to a mirror box of an SLR
camera having a quick-return mirror accommodated in the mirror box,
wherein the quick-return mirror has a half mirror portion so that a light
bundle of an object which is passed through the half mirror portion is
reflected by a sub-mirror to be incident on the autofocus module. The
fixing device includes an adjustment bracket which is provided separately
from the mirror box, the adjustment bracket is fixed to an underside of
the mirror box, and the auto focus module is fixed to the adjustment
bracket.
