I got my new K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit today and anxiously opened it to give it a try. My first impression is that this K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit is a well built camera phone accessory.
It is made of metal, aluminum I think, and is solid. It comes in it's own zippered case with foam packing that speaks of quality too. The nice feature about this K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit is the magnetic method to attach the filter. The filter itself magnetically snaps into place with a firm grip. There is no concern that the filter may ever just fall off.
The K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit connects via a thumb screw that tightens onto the camera screen to hold the filter frame secure. This is a bit concerning to me as I would think that if you aren't careful you could over tighten the screw and end up breaking the phone screen.
When I attached the K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit to my Galaxy S23 Ultra, which has 5 camera lenses, it looks like the filter slightly blocks the bottom camera (Telephoto 1). However, as I switched between the camera zooms and I didn't see/notice any actual blockage of the lens. I will keep an eye on this as I use theK&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit more to see if any thing is ever obstructed by the filter.
The filter lense itself also is well made. It has an aluminum outer ring and fits nicely into the frame and the lens is made of glass that is tinted for the CPL effect.
In all, I give the K&F Concept Clip On 67mm CPL Magnetic Phone Lens Filter Kit a thumbs up, but I do worry about over tightening and cracking my phone screen.

Wonderful magsafe stand, sadly I left it on a bench in Bergen ;(. I miss it

I was surprised how well this works to remove glare when taking pictures indoor at the aquarium. It is really fantastic at that.

My only concern is that you need to make sure to not have an overly bulky case. I have a fairly protective case, but it isn’t as bulky as the “old school” otterbox cases. This fits on my phone… but barely. It can be a pain to remove and reinstall. While it is always in my bag, I find myself using it only in circumstances when it would need to stay on. If I’m putting it on and taking it off, it simply stays off.

Overall, I’m very pleased with the results. I’m happy I have it, but I just don’t use it as much as I expected.

A CPL filter is extremely useful for car photography and with this you are now able to get better shots with a phone. I don't tend to use my phone for photography that much but this will be useful if my camera ever runs out of battery or if I forget my threaded CPL filter at the house. The clip is a bit of a pain to set up with a phone case but still workable and it is a lot more bulky with it attached but again it isn't that much of an issue.
It comes with a wipe which is really useful as fingerprints will be quite noticeable in photos.
Overall this CPL filter and attachment for phones is quite good and will be useful for people interested in car photography without a proper DSLR.

My best buy, I was tired of the tripods with the hooks that always ended up breaking but with this one it's too simple if you don't have an iPhone for example, it has a magnet that you can stick on the photo of your phone or just put it in the lining and that's it

This filter is compatible with my iPhone 14 and works great for controlling light and getting the amazing shot. The magnetic attachment is strong and makes it easy to switch filters quickly. The variable ND2-32 range is useful for different lighting conditions. The filter holder adapter fits well and keeps everything secure. The image quality is clear without any noticeable color shifts. However, it's a bit heavy.

Sturdy Stable Very good base with lots of stability Very good magnetic holder

A bit on the large side for having continually on my phone however it’s quick and easy to attach and remove. I live by the coast and on beach walks end up with a lot of glare on my photos however this helps reduce that and makes my photos clearer.

The magnetic attachment is very secure, keeping the filter in place without any issues. Easy to attach and detach, making it convenient for on-the-go photography. The variable ND filter effectively balances exposure and enhances color contrast, resulting in better photo quality. Works well with both smartphones and DSLR cameras, providing versatility for different devices.

Bellissimo does its job well magsafe very powerful