Patent application number is JP2018-112698

A lens mount part in which wearing of an interchangeable lens and removal are possible,

An image sensor which carries out photoelectric conversion of the light flux which passed the aforementioned interchangeable lens.

It has an optical system provided between the aforementioned lens mount part and the aforementioned image sensor.

The aforementioned optical system is interlocked with operation which removes the aforementioned interchangeable lens from the aforementioned lens mount part, and moves to a first position that light flux from the aforementioned optical system does not image to the aforementioned image sensor.