Featuring an aluminum frame with small built-in magnets, the Mist Diffusion 1/8 + 6-Stop ND Magnetic Clip-In Filter for Canon RF from Kolari Vision secures magnetically to the camera mount, and your lens then mounts on top. The filter sits securely between the camera and lens. It's compatible with the Canon EOS R, R5, R6, and RP. Specifically for the Canon RP camera, a mag mount accessory is included. The Canon RP doesn't have the steel elements necessary to support magnetic attachment of this filter. The mag mount has adhesive strips that provide a solution.
The filter material of the clip-in filter is glass. A small removal tool is included but not required. The compact tool looks like a guitar pick and is included just in case, as the filter can easily be removed by hand. Also, this filter can be used in combination with the optional Kolari Canon RF to EF Drop-In Filter Adapter, which secures to the camera and holds a drop-in filter. When the clip-in filter is used together with the drop-in filter adapter, you can use two filters at the same time.