From Canon USA:
What is the Control Ring's Clicking Sound Modification Service?
Canon’s control ring’s modification service offers RF lenses and Control Ring Mount Adapter EF-EOS R owners the opportunity to remove/reapply the control ring's clicking sound.
Why might this be needed?
The click action of the control ring allows the user to have a sense of how much it is being turned. However, if used during video shooting, the sound of the control ring operation may be recorded.
|Control Ring Mount Adapter EF-EOS R||$59.99|
Customer Support Operations
Canon U.S.A., Inc.
Contact Information for Inquiries
Canon Customer Support Center
Phone: 1-800-OK-CANON (toll free) 1-800-652-2666
For additional support options: usa.canon.com/support