Patent ID: 7978227

Claim:
An imaging apparatus, comprising: a viewfinder optical system for guiding an observation light beam to a viewfinder window, the observation light beam being output from an imaging optical system and then reflected from a main reflective surface; an imaging element for generating an image signal in response to the reception of the observation light beam; exposure control means for performing exposure control of the imaging element in response to the image signal from the imaging element; and a light sensing detector for measuring light, wherein the exposure control means determines an exposure control value in the exposure control in response to a light measurement value provided by the light sensing detector if a predetermined condition is satisfied, wherein the exposure control means performs the exposure control including feedback control, the feedback control being performed to cause a pixel value of an exposure image provided by the imaging element to approach a target value of the pixel value, and wherein the exposure control means determines the exposure control value in response to the light measurement value provided by the light sensing detector if a deviation value between the pixel value of the exposure image and the target value of the pixel value is determined to be larger than a predetermined threshold.