Empty Drop-in Filter for Canon RF/EF Adapter

Upgrade your kit with our customizable Kolari Empty Drop-in Filter for EF-EOS R Lens Adapter. It’s designed to let you insert the glass from any threaded 52mm filter ring into our drop-in filter frame, giving you full creative control. With optional support, the frame can also accommodate 48mm (2”) and 49mm threaded filter glass, expanding your compatibility even further. All of our Drop-In filters are compatible with Canon’s and Meike’s Drop-In adapter systems, as well as our own.

Kolari R Drop-in Filters for Canon EF-EOS R Lens Mount Adapter (EF/EF-S to RF) are designed with both durability and usability in mind. Each filter is machined from solid aluminum with a wide grip and a lanyard attachment point, offering lightweight strength, secure handling, and user-friendly customization. Our precision-fit attachment system applies just the right amount of pressure, making it easy to swap filters intuitively—while ensuring they stay firmly in place during use.

All Kolari R Drop-in Filters for Canon EF-EOS R Lens Mount Adapter (EF/EF-S to RF) feature advanced AR (anti-reflective) and AS (anti-smudge) coatings for improved light transmission, reduced reflections, and easy cleaning.

Works with:

Canon RF-mount camera bodies (e.g. EOS R, R5/R6/R7/R8/R50/RP) and RED Komodo/V-Raptor

Canon EF & EF-S lenses (mounted “behind” the adapter)

Drop-in filters from:

Kolari R series (ND, IR/UV-cut, UV-bandpass, IR-ND, etc.)

Canon’s own EF→RF drop-in filters

Meike-compatible drop-in filters

Does not work with:

RF-mount lenses (they cannot be attached through this adapter)

Standard front-mounted filters (only drop-in style filters fit the internal slot)