| 摘要 |
[Purpose] To reduce a focusing time. [Solution] A CPU performs a control for photographing a main subject in absence of auxiliary light, whereby an image signal PSA is outputted from an analogue signal processing section. Next, the CPU performs a control for photographing the main subject in presence of the auxiliary light, whereby an image signal PSB is outputted from the analogue signal processing section. An AF area extracting section extracts image signals PSa, PSb in an AF area from the image signals PSA, PSB. A differential signal calculating section outputs a differential signal DELTA1 between the image signal PSa, PSb, and a distance measuring section compares magnitudes of that differential signal DELTA1 and a reference value in a distance data base to calculate distance information D1 based on the comparison result. An AF control section executes AF control of mountain climbing system with the use of the distance information D1.
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