Patent ID: 7747156

Claim:
A digital single-lens reflex camera comprising: a first mirror for reflecting part of a light beam coming from a subject through a photographing optical system as a first light beam, and transmitting the remaining light beam as a second light beam; a relay lens on which the first light beam is incident; a second mirror for reflecting part of the light beam passing through the relay lens as a third light beam, and transmitting the remaining light beam as a fourth light beam; a screen on which a subject image based on the third light beam is formed again; a loupe optical system for observing the subject image on the screen; an AF optical system on which the fourth light beam is incident; a focus-state detection part for detecting the focus state of the photographing optical system based on the fourth light beam passing through the AF optical system; an imaging part including an image pickup device repeatedly capturing images of the subject based on the second light beam; and a display part for performing live view display based on subject image signals output from the imaging part.