A digital camera is provided that includes a first wireless communication module and image data processor. The first wireless communication module transmits image data to a monitor device via wireless communication. The image data processor processes image data before transmitting it to the monitor device via the wireless communication module. The image data processor has a first mode in which the image data are compressed at a predetermined compression ratio when transmitting a through-the-lens image to the monitor device, and a second mode in which the image data are compressed less than the predetermined compression, including zero compression, while carrying out at least one of reducing a frame rate compared to the first mode or extracting part of an image comprising the image data.