Image pickup apparatus having first and second timers

An image pickup apparatus comprising:

• a mirror configured to move between a mirror-down state and a mirror-up state;
• a driver configured to drive the mirror;
• a processing unit configured to provide processing utilizing incident light when the mirror is in the mirror-down state;
• a first timer configured to start measuring a first preset time period when the driver starts driving the mirror in the mirror-up state to the mirror-down state;
• a detector configured to detect that the mirror is in the mirror-down state by the driver;
• a second timer configured to start measuring a second preset time period when the detector detects that the mirror reaches the mirror-down state;
• and
• a controller configured to make the processing unit execute the processing when the first timer finishes measuring the first preset time period and the second timer finishes measuring the second preset time period,
• wherein the first preset time period is a time period enough to attenuate bounds of the mirror after the mirror in the mirror-up state starts turning to the mirror-down state, when a power-supply voltage of the image pickup apparatus is a first voltage and when the driver starts turning the mirror from the mirror-up state to the mirror-down state, and
• wherein the second preset time period is a time period enough to attenuate bounds of the mirror after the mirror reaches the mirror-down state, when the power-supply voltage of the image pickup apparatus is a second voltage lower than the first voltage and when the driver starts turning the mirror from the mirror-up state to the mirror-down state.