Canon M5

Canon’s reportedly just filed for a patent for a new camera lens mount that initially appears to be similar to its EF and EF-M mounts.

Canon News was the first to catch the patent, believing that the lens mount design could be hinting at what we can expect from Canon’s upcoming full-frame mirrorless camera.

“Conventionally, the serial communication (synchronous serial communication) of a clock synchronization system has been adopted as a communication method of a camera and an interchangeable lens. The following technical contents are disclosed in the Patent document 1. First, synchronous serial communication is performed with the first communication speed with which an interchangeable lens old type can also communicate. When the interchangeable lens with which it is equipped is distinguished from a new lens by the communication content, it changes to the synchronous serial communication in a more nearly high-speed second communication speed,” Canon News roughly translates from the patent text.

One of the key pieces we can abstract from Canon News’ report hints at the lens mount being able to support both “old” and “new” types of lenses.

Canon's design for its new mount
Canon’s design for its new mount

In the design of the existing EF and EF-M mounts, there are 9 contacts on the EF-M and 8 on the EF. The new mount only has 7.

“We’ve been told that the mount solution for a full frame mirrorless camera would be interesting, but this is the first time we can confirm that Canon is working on a new mount,” Canon Rumors reports, “though there’s no way of knowing if this is indeed for the upcoming full frame mirrorless camera body.”

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