Re:Canon EF and RF Lenses – All Autofocus Motors
by nayuki on Tuesday March 11, 2025 @05:36PM
(#43337282)
> this whooshing noise is not generated by the piezoelectric part but rather from the connected focusing mechanism
Indeed. I never implied that the piezoelectric part makes an audible whooshing noise. I only meant to say that the entire Ring USM system makes that noise, and so it will affect audio recorded on the camera's on-board microphone. Either way, that noise explains the motivation for the development of STM AF and I guess Nano USM.
Agreed with everything else you said. Thanks again for your fantastic articles and replies!
Indeed. I never implied that the piezoelectric part makes an audible whooshing noise. I only meant to say that the entire Ring USM system makes that noise, and so it will affect audio recorded on the camera's on-board microphone. Either way, that noise explains the motivation for the development of STM AF and I guess Nano USM.
Agreed with everything else you said. Thanks again for your fantastic articles and replies!