The Hot Mirror Pro 2 Drop-In Filter from Kolari Vision is compatible with the EF to EOS R drop-in filter adapter from Kolari or Canon. The filter is designed to normalize your camera when it has either a full spectrum or two-spectrum modification. In either case, it allows light to pass normally to the sensor, so you can shoot normal photos. The difference between the pro 2 and standard version drop-in hot mirror filters is that this pro 2 version has a virtually equivalent transmission curve as the hot mirror in the Canon EOS R5 camera. Accordingly, it ensures better performance when using auto white balance and better color rendition. It does this for all the EOS R cameras the EF-EOS R drop-in filter adapter is compatible with.
The filter can only be used with a modified camera. A spectrum-modified camera is one in which the camera's native low-pass filter was removed in order to support certain IR filters for IR photography. If you have such a camera, this hot mirror filter will let you take normal photos without having to make any changes to the spectrum modification. The filter blocks IR light and some UV light, the same way the native low-pass filter that was removed from the camera during modification would have. The filter requires no exposure compensation.
The frame is aluminum and the optics are glass with AR/AS coatings for increased transmission, reduced reflections, and easy cleaning. The filter has a wide grip and offers a lanyard attachment point for your convenience. It's thickness-matched to minimize focus shift.