Single lens reflex camera

A single lens reflex camera comprising:

• a mirror box provided in a camera body, said mirror box comprising means for supporting a mirror, located on an optical axis of a photographing lens, for up and down movement, said mirror box and said mirror comprising a unit which is detachably attachable to a camera body;
• means for driving said mirror for up and down movement in accordance with a shutter release operation, said mirror driving means being operable when said driving means is charged, said mirror driving means being assembled to said mirror box;
• a diaphragm control mechanism for controlling an aperture size of a diaphragm, said diaphragm control mechanism mounted to a mounting member, separate from said mirror box, said mounting member and said diaphragm control mechanism comprising a unit which is detachably attachable to said camera body;
• charge/reset means for charging said driving means and for resetting said diaphragm control mechanism, wherein said charge/reset means charges said mirror driving means to render said mirror driving means operable, and reset said diaphragm control mechanism so that an aperture size of a diaphragm is changeable between a full open state and a smallest state;
• means for mounting said charge/reset means to said camera body;
• and
• said charge/reset means comprising means for mechanically and functionally connecting said mirror driving means and said diaphragm control mechanism.