Automatic focusing apparatus as well as lens apparatus and image pickup system including the automatic focusing apparatus

摘要

An automatic focusing apparatus includes: a first focus detector that detects a first focus evaluation value based on a phase difference; a second focus detector that detects a second focus evaluation value using a signal from an image pickup element; a focusing mechanism; a focus controller that controls the focusing mechanism based on the first focus evaluation value obtained by the first focus detector and the second focus evaluation value obtained by the second focus detector; and a speed setting unit that sets, in a process obtaining an in-focus state by using the focus controller, a driving speed for the focus controller to drive the focusing mechanism based on a first data detected by the first focus detector and the second focus evaluation value.

主权项

1. An automatic focusing apparatus comprising:
a first detector that detects first information based on a signal from a phase difference sensor; a second detector that detects second information based on a signal from an image pickup element; a focusing mechanism; a focus controller that controls the focusing mechanism based on the first information and the second information; a speed setting unit that sets, in a process obtaining an in-focus state using the focus controller, a driving speed for the focus controller to drive the focusing mechanism by comparing a threshold value with the second information; and a threshold value setting unit that sets the threshold value based on third information obtained by the phase difference sensor, the third information being different from the first information.