| 摘要 |
PROBLEM TO BE SOLVED: To make a 1st photodetector part and a 2nd photodetector part accurately receivable luminous flux from a light source. SOLUTION: This device is equipped with a half mirror 53 dividing the luminous flux from the light source 332 passing through an exposure area 311 in two, an image pickup means 62 receiving the luminous flux reflected by the half mirror 53, and a photometric sensor receiving the luminous flux transmitted through the half mirror 53. The half mirror 53 is attached to a lens base 51 to which an exposure lens 52 forming a film image on a photosensitive material is attached, and moved onto the optical axis L of the light source 332 when the lens 52 is moved to a retreat position where it is separated from the position on the optical axis L, and the photometric sensor 63 is attached to the lens base 51 so as to integrally move with the half mirror 53.
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