Astro Clip-in Filter For Canon RF – Magnetic

Our Kolari Magnetic Clip-in Filters for RF-Mount (Astro) provide several filter options to help enhance your Astrophotography images. Engineered with Kolari’s professional-level optics, these filters are available in two options: UV/IR Cut H Alpha Pass, and Light Pollution Filter.

Crafted with the premium optical glass we’re known for, our Kolari Magnetic Clip-in Filters for RF-Mount are finished with advanced anti-reflective and anti-smudge hard coatings to boost light transmission and reduce flares and ghosting. These multi-coated filters are also hydrophobic, dust-resistant, and scratch-resistant, making them easy to clean and built to withstand the demands of any shooting environment.

Each filter is housed in a precision CNC-machined aluminum magnetic frame designed for Canon RF-mount cameras. This rear-mounted solution works seamlessly with lenses that lack front filter threads and can also be paired with external lens filters, allowing for flexible, multi-layered filtration setups.

For even more versatility, you can pair these filters with our Kolari EF-EOS R Drop-In Filter Mount Adapter, allowing for three total layers of filtration.

Our Light Pollution Filter is designed to enhance night sky photography by selectively blocking the most common wavelengths emitted by artificial lighting, such as streetlights, mercury vapor, and sodium lamps. By reducing this unwanted glow, the filter helps restore natural contrast to the night sky, making stars, nebulae, and other celestial objects stand out with greater clarity.

Perfect for astrophotographers shooting in urban or suburban environments, this filter enables deeper exposures, improved color balance, and more defined detail in your images.

This filter is compatible with both stock and full-spectrum cameras.

Our UV/IR Cut Filter (H-Alpha Pass) is specially designed for astrophotographers using full-spectrum converted cameras. It blocks unwanted ultraviolet and infrared light while allowing critical emission lines—specifically H-alpha (656nm) and Sulfur II (672nm)—to pass through, making it ideal for capturing deep-sky objects like nebulae with enhanced clarity and detail.

With a similar transmission profile to our standard UV/IR Cut Hot Mirror, this version offers an expanded spectral window tailored for emission line imaging. When paired with a full-spectrum modified camera, it delivers over 4× greater sensitivity to the H-alpha line and more than 6× greater sensitivity to Sulfur II compared to an unmodified stock camera. This dramatic boost in signal allows for shorter exposures, finer details, and better contrast in faint astronomical targets.

While designed with astrophotography in mind, this filter is also effective at minimizing IR contamination when used with stock unconverted cameras that experience residual IR leakage.

Our Kolari R Clip-In Filters are compatible with the Canon EOS RP, R, R1, R3, R5, R6, R6 II, R8, R7, R10 & R100**!

The Canon EOS RP, R8, and crop-sensor models (R7, R10 & R100) have a non-magnetic plastic inner mount but we provide a magnetic mounting plate with our filters that easily convert your RP, R7, R10 & R100 to be compatible with our magnetic clip-in filters.

The R, R3, R5, R6, R6 II are slightly magnetic but a mag mount is highly recommended for best functionality, additional strength, and protecting the baseplate from scratches.

* The R50 is not supported at this time.

* The Canon RF-S 18-150 lens is not compatible with our standard or slim clip-in filters.

*APS-C mount considerations (R50, R100, R7, R10). The APSC RF-S cameras have slightly smaller mounts and have reduced compatibility. The R10 and R7 are compatible with our regular clip ins, but the R50 and R100 are only compatible with the slim and ultra slim version. We highly recommend the ultra-slim frame style to maximize compatibility with these cameras. Please note, stacking is not supported on these cameras.

*The Canon RF 28mm f/2.8 and the Canon RF 28-70mm f/2.8 are not compatible with our standard or slim clip-in filters.

* The Canon RF-S 18-150mm and RF-S 10-20mm lenses are not compatible with our standard or slim clip-in filters.

* Metabones EF to RF Speed Booster Ultra 0.71x is not compatible with our standard, slim, or ultra-slim clip-in filters. Other speed boosters may not be compatible with clip-ins.

Astrophotography Warning: Astrophotography thoroughly tests the optics of any camera system and lens. Ultrawide lenses are particularly challenging because of the high rear incidence angles involved where any additional glass has the possibility of inducing a field curvature which can cause corner sharpness on a lens-by-lens basis; this effect is most noticeable at wide apertures. While this should always be a consideration with any ultra wide lens, we typically only see issues with astrophotography where the target subject is a series of geometrically perfect points of light at infinity, shot at wide apertures.

We understand that Astrophotography can be challenging, but don’t worry, we have many resources and tutorials available for astrophotographers.

Here are a few of our most popular tips and tricks below:

Choosing a Full Spectrum or H-alpha Conversion for Astrophotography

Packing for Wilderness Backpacking for Astro and Infrared Photography

Narrowband Hydrogen Alpha Filters for Landscape Astrophotography

Choosing a Camera Brand for Astrophotography