Optical apparatus, control method thereof and storage medium

A method of controlling an optical apparatus comprising a shake detection unit configured to detect a shake of the optical apparatus, a first optical correction unit configured to correct an image blur based on the shake detected by the shake detection unit, and a second optical correction unit configured to correct an image blur based on the shake detected by the shake detection unit, the method comprising:

• a zoom detection step of detecting whether a zoom lens is performing a zoom operation;
• a correction amount calculation step of calculating, based on the shake, correction amounts to be corrected by the first optical correction unit and the second optical correction unit;
• and
• a control step of changing a calculation method of the correction amounts calculated in the correction amount calculation step according to whether the zoom lens performs the zoom operation or whether the zoom lens stops the zoom operation,
• wherein in the control step, the correction amount calculation step is controlled to calculate the correction amounts to be corrected by the first optical correction unit and the second optical correction unit by calculation of separating a frequency of the shake when the zoom operation is stopped, and to calculate the correction amounts to be corrected by the first optical correction unit and the second optical correction unit by proportional calculation based on movable ranges of the first optical correction unit and the second optical correction unit when the zoom operation is performed.