Hot Mirror Drop-in Filter for Canon RF/EF Adapter

Filter blocks ultraviolet and infrared light while passing only visible wavelengths. This restores natural color, proper contrast, and accurate focus performance—making your full-spectrum camera behave like a factory-stock model for everyday shooting. It’s an essential tool for photographers who need one camera body for both creative and standard photography.

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.

Also known as a lowpass filter or UV/IR cut filter, our UV/IR Cut Color Correcting Hot Mirror Filter blocks infrared light and some UV, and allows a full spectrum converted camera to take normal pictures. Our hot-mirror filters include an anti-reflective corrosion resistant coating, which reduces artifacts and increases durability of the filter in humid regions.

This is the first filter designed specifically for use with a full spectrum or two spectrum converted camera and was designed with a similar transmission of the hotmirror filters that cameras normally employ. Because of its design, it allows for normal use of the camera with all of the regular white balance presets still working. You will notice the color of this filter is blue, unlike other hotmirror filters that are clear. This is a good thing, the original lowpass filters found in cameras are this same shade of blue, this is a visual confirmation that the filter is blocking the same wavelengths.

A note about wide angle: Unlike the B+W 486 filter (a popular hotmirror filter), this filter does not block light by interference, but instead uses absorbtion. This means that regardless of the angle of incidence, the color will not change. The B+W 486 will cause color changes on wide angles around the edges, ours will not.

The filter requires no exposure compensation.

Not all camera lowpass filters have the same transmission. Ours is designed with aggressive IR blockage to eliminate IR leak on all camera models.

A common question that people have while converting their camera to full-spectrum is whether or not they can still shoot in “regular light.” The short answer is yes, you absolutely can. The long answer is that with an external filter that’s designed to cut UV and IR light, the image will be taken within the visible light spectrum but some filters can just be a bit off in auto white balance.

This is exactly why we’re proud to introduce the next generation of filters of its kind, the Kolari Hot Mirror Pro 2. With more than 50 layers of optical coating put on over a 10 hour period, each Hot Mirror Pro 2 is made with quality and precision in mind.

When we introduced our original hot mirror filter, we optimized the spectral response to match the cameras that were on the market at the time as closely as possible. Now almost 10 years later, cameras have changed and our filter manufacturing capabilities have improved. We may have had the best hot mirror on the market already, but we’ve taken things a step further and outdone ourselves with the Hot Mirror Pro 2. We can now achieve even higher color accuracy and virtually identical performance to stock cameras with an auto white balance.

Our Kolari Vision Pro UV/IR Cut Filter (H-Alpha Pass) helps prevent color casts and unwanted IR leaks for CMOS and CCD in situations where the original UV/IR still lets some IR light pass. This filter has a similar transmission to our UV/IR Cut Hot Mirror Filter, but with an expanded spectral response covering the H-alpha and sulfur II emission lines making it also useful for Astrophotography when used with a Full-Spectrum converted camera.

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)