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.