OPTICAL APPARATUS THAT PERFORMS MANUAL FOCUS SHOOTING, AND FOCUSING METHOD

摘要

An optical apparatus which is capable of, when performing manual focus shooting, freely adjusting a rack focus speed and stabilizing a final focusing accuracy for a shooting subject. Operation of the focus lens, which is driven in a direction of an optical axis by a motor, is controlled in accordance with rotation of a manual focus ring. A position of the focus lens in the direction of the optical axis, which is detected when the focus lens lies at a predetermined position, is stored in a storage unit. According to the relationship between a signal indicative of a current position of a focus lens and a signal indicative of a position of the focus lens, which is stored in the storage unit, the amount by which the focus lens is driven relative to rotation of a manual focus ring is changed.