Imaging apparatus, operation method of imaging apparatus, and program

A non-transitory computer-readable storage medium storing a program for causing a computer applied to an imaging apparatus to execute a process,

• wherein the imaging apparatus comprises a mechanical shutter, and an image sensor,
• the process comprising:
• performing, based on vibration of the imaging apparatus, movement control of moving the image sensor in a direction in which shake of an image, which is obtained by imaging performed by the image sensor, is corrected;
• and
• performing, in the imaging performed by the image sensor, gain-up control of increasing a gain of the movement control in a case where a shutter speed of the mechanical shutter is shorter than a first default time and longer than a second default time compared to a case where the shutter speed of the mechanical shutter is longer than the first default time.