Imaging device

An imaging device comprising:

• a connector conforming to a predetermined standard and having a plurality of terminals including first and second ground terminals;
• a first communication unit configured to communicate with a first external device having a communication interface of the predetermined standard when the first external device is connected to the connector;
• and
• a second communication unit configured to communicate with a second external device configured to perform communication using the first and second ground terminals alone among the plurality of terminals when the second external device is connected to the connector, wherein
• the second external device is a remote controller configured to control an operation of the imaging device, and transmits a signal to the imaging device by switching a resistance value between the first ground terminal and the second ground terminal.