This is a great combo filter. It comes with a very nice leather-like pouch and feels sturdy and nice. I got the 67mm and it fit perfectly on my Canon RF 85mm f2.0 prime lens -- look on the rear of the lens cap for your lens' diameter. The lens cap fits on top of the filter just fine.

I also have an RF 35mm f1.8 with a 52mm diameter -- I ordered the K&F Concept 52mm to 67mm Step-Up Lens Filter Adapter Ring so that I can easily switch this expensive filter back and forth rather than having to buy two filters.

One thing to beware of is that it seems like it would be very easy to over tighten this and get it stuck. It doesn't screw on and stop -- you can keep turning it. I nearly went too far the first time I put it on so now I don't tighten it as far as I would like.

The filter itself works wonderfully. I like the combined ND and CPL filters. The ND is for removing some light when taking videos (since you can't really adjust shutter speed for videos) and the CPL is for removing light reflections for videos or photos. It makes it look like when you put on a fancy pair of polarized sunglasses on a bright day.

I do wish the variable turning handle had some hard stops or even any kind of tactile click when it gets to the next stop, but it is smooth and so you have to have it away from your face and look to see when the dots match up visually rather than being able to click through the settings with the camera up to your face the whole time.

Overall though, this is a terrific filter with high quality engineering from a trusted brand. Would highly recommend this.