Yes, it features dust and moisture-resistant construction. However, a front filter (82mm) is required to complete the weather seal at the front of the lens.
Yes, it is fully compatible with Canon EOS R, R5, R6, and other R-series cameras when used with an EF-to-RF Mount Adapter.
This lens uses an 82mm filter thread. Note that this is larger than the 77mm thread found on the f/4 version or the original Mark I version.
Yes, the USM motor provides quiet focusing, and the constant f/2.8 aperture allows for consistent exposure while zooming, making it a favorite for gimbal-mounted wide shots.