| 摘要 |
PROBLEM TO BE SOLVED: To improve probability for enabling focus detecting operation. SOLUTION: When second illumination means 202, 212 illuminating outside world corresponding to plural regions in a screen are mounted in an optical device, the second illumination means 202, 212 are selected as auxiliary light at the time of detecting a focus even when either a first mode for detecting focusing states in at least two and more places in the plural regions or a second mode for detecting focusing state in a prescribed region in the plural regions is selected. When a third illuminating means illuminating an outside world corresponding to a prescribed region in the plural regions is mounted in the optical device, an auxiliary light selecting means 100, for selecting first illuminating means 102, 112 for illuminating the outside world corresponding to plural regions in the optical device in a first mode and a third illuminating means in a second mode, is provided. |
