The magnetic adapter ring is a plus. You can even stack it with the ND filter. The case is also very durable and should be great for protecting my filter when tucked into my camera bag.

Overall I am very impressed with this filter. It's so satisfying how the filter snaps into place. This filter will definitely be a staple in my everyday camera accessories and I would recommend this to any amateur or professional photographer/videographer.

K&F Concept is synonymous with quality. I already had other filters of theirs, albeit quite old and with several years of service behind them. By virtue of my imminent photographic journey, I decided to opt for something new, always relying on them. I'll show you in detail what are, in my opinion, the pros and cons of their new product. First of all, the packaging is really excellent: the box is made of very sturdy cardboard, even impossible to fold, and then the magnetic opening is very pleasant. The filter is stored in a leatherette case with magnetic closure and not in plastic, which gives the product a finish that we can define as "premium". Inside, wrapped in a protective bag, is the filter. It is a fairly heavy piece, already to the touch it gives an excellent impression. The body is in aluminum, the glasses are of excellent finish. Very thin (and this is good because in this way any loss of sharpness is reduced), waterproof and scratch resistant. Very pleasant (and very useful!) the orange little thing that is used to vary the intensity of the filter itself: the only drawback is not having a limited stroke during rotation, but it is not a big problem, since the ND2 and ND400 are indicated right on the end of the filter itself. In any case, the filter has been constructed in such a way that, even when going beyond the limits, the annoying "X" shadow does not appear. For the moment I've only been able to try it in the city on a rather gloomy day, in the next few days I hope to integrate my review with other shots in the mountains. Who is the filter for? Definitely for those who love landscape photography or for those who have the desire to take long exposures in the city (remaining within the limits of 9 stops): of course, the product is not the cheapest on the market, but just try it for a while to understand which is worth every penny. I'm not a photography professional, but for my use it's just fine.

This magnetic phone lens filter clip comes in its own storage case,
It’s appears to be made very well, no plasticy parts all metal.
The ND filter density is variable from ND2- ND32 so there is a fair amount of scope.
Other styles of magnetic filters are made by this manufacturer so this makes this a very versatile kit.
The fitting of the clip doesn’t fit that well to my phone case, now this might be down to the style of case I have, (see photo) when I removed the case and attached the clip it fitted like a glove.
I might purchase a cheap phone skin to see if clip fits as it should, if it does I’m gonna buy the CPL filter for this clip.

Fast delivery Very robust packaging Great leather case with magnetic closure Filter looks robust and high quality Filter without scratches and stains. An update will follow after first use.

Glass filter that comes nicely packaged (leather-like hard case and magnetic closure. It doesn't distort the colors and the 3 steps of EV are correct.

Complete in its own two-tone faux-leather case with locking magnetic lid, K&F are stepping up their game with their Nano-X line of filters.

This circular polarizer combined with a variable density filter (up to five stops) is built to the highest optical and mechanical standards. It's a first class filter with 28 layers of multi-coating to reduce flare and protect the surface. You won't be disappointed.

K&F magnetic filters - CPL, UV, ND1000 - Excellent choice ! Packaging : 6,5 / 10 Nice case that keeps the filters together and protected. With velcro and ring to attach it to a belt or backpack. I don't particularly like the plastic box, I would have preferred something ecological like for other brands, but it's not something important in use so it weighs less on the judgment of the packaging. Handling: 9,5/10 Excellent workmanship, the filter is metal, threaded which fits well into every lens in my possession. Great that they are magnetic. In some conditions, screwing on a filter is very difficult and time consuming as well as the risk of it slipping out of your hands. In the case of the K&F magnetic filters, you just have to leave the holder mounted. If necessary, simply move the filter closer to the lens and it will attach itself powerfully and precisely. This feature is the main reason to buy these filters. Optical quality: 8/10 ND filter: Excellent sharpness: there is no loss of quality in high contrast areas. As with most ND filters, the filter has a purple/magenta cast, nothing that can't be corrected in post-production (see photos - doesn't work on PC just to show the quality of the filters). Slight vignetting, but really slight, nothing major. Score : 8/10 Polarizer / CPL Filter: Very very sharp filter, no loss of quality when editing. It tends to slightly "warm up" the images, but again nothing that can't be corrected with a touch in post-production. Excellent reduction of reflections on water and leaves affected by bright light. I don't like the effect of the sky being too intensified towards the Blue color (which also happens with all the other CPL filters I've tested). Important note in this case, it does not produce any additional flare compared to a use without filters UV filter: I never use UV filters because I find them useless except in case of danger for the lens (salt / water splashes / resins, sand). I must say however that this one has a good performance, it does not lose sharpness or worsen the flare compared to the lens without filter. Quality/Price: 9/10 For the general quality of the filters in question the price is LOW. Such a kit is suitable for both demanding amateurs and professionals because the weak points of these filters are few and in any case surmountable, while the strong points (speed of use and sharpness) are more important.

K&F magnetic filters - CPL, UV, ND1000 - Excellent choice !
Packaging : 6,5 / 10
Nice case that keeps the filters together and protected. With velcro and ring to attach it to a belt or backpack.
I don't particularly like the plastic box, I would have preferred something ecological like for other brands, but it's not something important in use so it weighs less on the judgment of the packaging.

Handling: 9,5/10
Excellent workmanship, the filter is metal, threaded which fits well into every lens in my possession.
Great that they are magnetic. In some conditions, screwing on a filter is very difficult and time consuming as well as the risk of it slipping out of your hands. In the case of the K&F magnetic filters, you just have to leave the holder mounted. If necessary, simply move the filter closer to the lens and it will attach itself powerfully and precisely.
This feature is the main reason to buy these filters.

Optical quality: 8/10
ND filter: Excellent sharpness: there is no loss of quality in high contrast areas. As with most ND filters, the filter has a purple/magenta cast, nothing that can't be corrected in post-production (see photos - doesn't work on PC just to show the quality of the filters). Slight vignetting, but really slight, nothing major. Score : 8/10

Polarizer / CPL Filter: Very very sharp filter, no loss of quality when editing. It tends to slightly "warm up" the images, but again nothing that can't be corrected with a touch in post-production. Excellent reduction of reflections on water and leaves affected by bright light. I don't like the effect of the sky being too intensified towards the Blue color (which also happens with all the other CPL filters I've tested). Important note in this case, it does not produce any additional flare compared to a use without filters

UV filter: I never use UV filters because I find them useless except in case of danger for the lens (salt / water splashes / resins, sand). I must say however that this one has a good performance, it does not lose sharpness or worsen the flare compared to the lens without filter.

Quality/Price: 9/10
For the general quality of the filters in question the price is LOW.
Such a kit is suitable for both demanding amateurs and professionals because the weak points of these filters are few and in any case surmountable, while the strong points (speed of use and sharpness) are more important.