Here's an interesting patent from Canon. This patent covers fingerprint ID on your cameras and lenses that can control custom functions such as IS, AF and likely anything else you can think of. It also offers the ability to customize the camera and/or lens for multiple users as well as offering a complete lockout of the gear.

Below is a flowchart showing how it works.

patentfinger2 728x593 - Patent: Fingerprint ID on Your Cameras and Lenses

You can see the patent at the USPTO web site.

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