| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easy-to-use lens for which lens attachment/detachment detection is performed with a simple structure. <P>SOLUTION: An interchangeable lens comprises: control means for controlling communication means so that a signal level of a first lens side contact point becomes a signal level corresponding to a first truth value, when a camera body is not mounted on mounting means and when the camera body is mounted on the mounting means and data communication is not performed by the communication means. The communication means outputs, to the first lens side contact point, a signal that is neither a data signal nor a clock signal and that does not contain a signal level corresponding to a second truth value different from the first truth value continuously for more than a first predetermined time, when data communication is performed. The control means controls the communication means so that a stop signal containing a signal level corresponding to the second truth value continuously for more than the first predetermined time is transmitted to the first lens side contact point at a predetermined timing, when a member to be driven is not driven. <P>COPYRIGHT: (C)2013,JPO&INPIT |
