Image pickup system, image pickup apparatus, and interchangeable lens

摘要

An image pickup system includes an interchangeable lens and an image pickup apparatus on which the interchangeable lens is mounted. The image pickup apparatus includes an image pickup unit for generating image signals, a focus information obtaining unit for obtaining pieces of focus detection information generated on the basis of the image signals, and a focus time determining unit for determining a focus time when the focus lens has passed a focus position. The interchangeable lens includes a lens position detector for successively detecting positions of the focus lens, a storing unit for storing pieces of lens position history information in chronological order, and a focus position determining unit for determining a position of the focus lens at the focus time as the focus position on the basis of the pieces of lens position history information stored in chronological order in the storing unit.