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.

主权项

1. An optical apparatus comprising:
a focus lens configured to be movable in a direction of an optical axis; a manual focus ring configured to be rotatable; a drive unit configured to drive said focus lens in the direction of the optical axis; a drive control unit configured to control operation of said focus lens via said drive unit in accordance with rotation of said manual focus ring; a position detecting unit configured to detect a position of said focus lens in the direction of the optical axis; a storage unit configured to store the position of said focus lens detected by said position detecting unit when said focus lens lies at a predetermined position; and a focusing control unit configured to, according to a relationship between a signal indicative of a current position of said focus lens, which is detected by said position detecting unit, and a signal indicative of the position of said focus lens, which is stored in said storage unit, change an amount by which said focus lens is driven relative to rotation of said manual focus ring, independently of said drive control unit.