Shutter device and imaging apparatus

A shutter device comprising:

• a base plate including an opening;
• a blade unit configured to switch a state of the opening between a closed state and an opened state;
• a driving member attached to the blade unit and configured to drive the blade unit;
• a motor;
• a decelerator configured to decelerate power from the motor;
• a first connector engaged with the decelerator;
• a second connector having one end attached to the driving member and another end attached to the first connector;
• a first position detector configured to detect passage through a predetermined position in a moving locus of the driving member or the first connector;
• and
• a second position detector configured to detect a relative difference from the first position detector,
• wherein the blade unit switches the state of the opening from the closed state to the opened state by continuous rotation of the first connector in a first direction, and
• wherein driving of the motor is controlled based on results of the detection by the first position detector and the second position detector.