Image signal recording system and optical device

摘要

There is disclosed a command-answer type serial communication device between TV lens and TV camera, or between TV lens and accessory. In the command-answer type serial communication, answer data is transferred in response to a command in ordinary communication, but data to be processed at high speed on the side of a device having transferred the command is transmitted to a camera from a lens even if no command is transmitted, so that high-speed communication can be performed. <IMAGE>