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A patent for a Canon DSLR body cap that lubricates and protects the lens mount has appeared. I've never personally experienced a dried out or wind burned camera body lens mount, but maybe you have?
As pointed out in the forum though, this sort of concept could be to help protect the rubber seals on lenses. They can crack over time and need replacement. Or perhaps it's to keep the contacts on the camera body and lens clean, maybe both.
Patent Publication No. 2015-121747 (Google Translated)
- Published 2015.7.2
- Filing date 2013.12.25
Canon patents
- Mount Cap
- The mount and abutting surface, and oil-impregnated possible member, such as a porous plastic
