| 摘要 |
An image pickup apparatus according to the present invention includes an apparatus body including an image sensor built therein, and a lens unit, the apparatus body is provided with a back focus adjustment mechanism and a sliding member which is slidable in a direction perpendicular to an optical axis of the image sensor, the sliding member is provided with an infrared blocking filter and a dummy glass plate arranged next to each other, the apparatus is capable of switching modes between a day photographing mode in which the infrared blocking filter is positioned on the optical axis of the image sensor and a night photographing mode in which the dummy glass plate is positioned on the optical axis of the image sensor, and the dummy glass plate has a thickness greater than a thickness with which optical path length extension equivalent to that with the infrared blocking filter is obtained.
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