A Review of the Canon Drop-in Filter Mount EF-to-RF Adapter With Built-in Polarizing Filter

Canon's EF-to-RF adapters are already a great way to ease the transition from DSLRs to mirrorless while maintaining good performance. Beyond enabling you to use your EF mount lenses, the higher-end adapters let you use a drop-in variable ND filter or circular polarizing filter, saving the need to carry large filters or step-down rings. This excellent video review takes a look at the circular polarizing filter version. 

Coming to you from Gordon Laing, this great video review takes a look at the Canon EF-RF mount adapter with drop-in circular polarizer filter. One of the nice things about using EF lenses on an RF mount camera is that unlike putting a lens on another brand of camera, you can expect near-equal (or sometimes even better) autofocus performance. Beyond that, Canon's upper-end adapter allows for drop-in circular polarizer or variable ND filter usage. This is fantastic, as you do not need to worry about carrying a bunch of different filter sizes or step-down rings in the field, and you can even use them with lenses that don't accept screw-in filters instead of resorting to expensive and cumbersome filter holder systems. Altogether, these look like a clever use of what would otherwise be empty space in between the lens' rear element and the camera sensor. Check out the video above for Laing's full thoughts.