Interchangeable lens camera, camera body, lens unit, and busy signal control method

摘要

An aspect of the present invention provides an interchangeable lens camera having a camera body and a lens unit that is freely attachable and detachable to the camera body. In the interchangeable lens camera, a communications unit in the camera body sends via communications terminals (MT_MOSI and MT_MISO) an INTR_BUSY control instruction that instructs whether to make notification with a busy signal (INTR_BUSY signal) for any operation out of a plurality of types of operations that can be executed, and the lens unit or camera body communications unit sets the busy signal (INTR_BUSY) to an ON state (low level) only during the period of operation of the type indicated by the INTR_BUSY control instruction.

主权项

1. A lens unit attachable to and detachable from a camera body, comprising:
a communication signal terminal for communicating with the camera body, a busy signal terminal for a busy signal indicating whether the lens unit is during a period of an operation; and a communicating part for communicating with the camera body via the communication signal terminal and the busy signal terminal, wherein the communicating part receives a busy signal control instruction which is capable of indicating a type of an operation that can be performed at the lens unit via the communication signal terminal, and sets the busy signal to an ON state during the operation of the type indicated by the busy signal control instruction.