Canon has finally released information about their RF lens control ring modification that was announced alongside the EOS R last year.
The service is a reasonable $79 USD. This service would likely benefit some video shooters. There's no mention of what it would cost to put a modified lens back to its stock form.
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|
*Tax and freight fee are NOT included *All pricing is subject to change