Automatic focus adjustment apparatus and method

A focus adjustment apparatus, which attains focus adjustment by extracting, as a focal point voltage, a predetermined frequency component of a video signal obtained from an image sensor upon sensing an image of an object, and moving a focus adjustment member in an optical axis direction using a moving unit to maximize the focal point voltage, comprising:

• a detector that detects two input states including a first input state, and a second input state which is set via the first input state;
• a controller that executes focus adjustment control for the first input state upon detection of the first input state, and selectively enables or disables the focus adjustment control for the first input state in accordance with a time elapsed from detection of the first input state until detection of the second input state, upon detection of the second input state;
• and
• a storage unit, wherein when the first input state is detected, said controller saves a position of the focus adjustment member at that time in said storage unit, and executes the focus adjustment control for the first input state, and when the second input state is detected, said controller disables the focus adjustment control for the first input state when a predetermined period of time has not elapsed from detection of the first input state until detection of the second input state, and moves the focus adjustment member to the position of the focus adjustment member saved in said storage unit.