I decided on the 3-stop version because I was looking for a little help during sunny days and this has worked perfectly. The magnet slaps right on place and is easy to remove with anything that has a thin corner like a guitar pick or a credit card. No more ND filters dependent on diameter size!

I'm not sure how long rear filters have been around, but this is absolutly groundbreaking for astrophotography, as well as other purpose filters ie: Polarizer, Neutral Density, B&W, etc. So much easier, and cheaper, than purchasing numerous front filters and the smudges and dust they attract, not to mention the space those velcro filter holders take up in your gear bag. I'd rather have room for another lens (or two). Simply cover your lens with a UV/protection filter. Lastly, these rear filters are simple and easy to change out. I'll personally just use one camera for astrophotography and will buy a rear Polarizer filter for one of my other cameras for daylight shooting.

It is a filter with the appropriate settings for use in both photos and videos, especially when the sunlight is not strong or the day is cloudy. Additionally, its internal use makes it convenient by eliminating the need to recalibrate a gimbal when removing or attaching it. It has a minimal impact on the white balance, which is very easy to correct. Highly convenient as with just one filter, I can use an infinite variety of lenses.

This filter is a must-have to protect your camera sensor from getting dirty, it is of superb quality. Definitely a must-have.

I really like everything except I needed to order a larger size to fit a circular polaizer.

Great filter.

I have only tested this filter on my Lifepixel-modified Canon R6 (v1), but I like it already. It produces some really interesting color combinations that my other Lifepixel IR filters do not. Samples below are with custom white balance in-camera.

I recently ordered this to have more options when shooting with a full-spectrum converted camera. It's great to be able to do false colour infrared without needing to use channel mixing in post production. It also opens up a wider range of treatments in the resulting files. I think it's my new favourite IR look.

I use a wide range of lenses, from cheap primes to large zooms, and my filter sizes vary across the range. With these clip-in filters, I can attach ND filters and shoot video with both RF and adapted EF lenses with no issues.

This 6 stop ND was perfect for shooting a music video outside in sunny Los Angeles, and the 1/8 Mist had just a hint of glow to highlights without killing the contrast. 

I own all three 1/8 mist (0-stop, 3-stop, and 6-stop), and I have one in my camera at all times. Looking to try the 1/4 mist at some point to compare.

This filter case is made well and the magnetic latch is secure. I have not tried a drop test but I see no need to.