I use this filter with a 56mm f1.4 lens for portrait photography, shoots, etc. And it works perfectly, it does not lose quality in the images. So I can take photos even if there is a lot of lighting without going over 1/250s

Great quality , easy changeable design instead of having to change filters , quick easy turn alters image quality. Easy to fit and use for great quality photos . I would certainly recommend this product.

At stop 512 with 24mm lens, i have black corner...when a looking the blue sky. But for the price i recommend this ;)

K&F does really nice things, and this ND filter is further proof of that. We are talking precisely about a variable nd filter, with 5-9 stops of dynamic range, which works really great. In a self-respecting filter, as far as I'm concerned, there are 2/3 important things: ease of assembly, glass quality and performance.
As for the ease of assembly, I thought it was magnetic, but the threaded connection always remains; which also makes sense for a product in this price range.
Excellent glass quality and consequently the photo rendering is also really good!

In short, a really well done product!

Thanks for your attention

The quality of the variable ND filter ND32- ND512 is very good made from very good materials.

I am impressed with the variable ND filter I was not expecting too much for this price BUT I am happy to have been proved wrong.

Rotating the filter is very smooth and easy I can just about turn it with one finger it really is effortless. You do not have to rotate it much to go from ND32 to ND512 which I like a lot and great if you’re trying to do this quickly.

Comes in a nice protective box not the normal square I have gotten with so many other filters/brands this is circular and see through so you know if the filter is in case without opening it or giving it a little rattle.

I can confirm so far I have not had any phantom X showing up in my pictures or on the display when I have been changing the ND values this really did impress me and I was expecting to see this at this price range as I have with previous filters at this price and some which cost more than this.

If I really had to find faults I have two which are minor and not that big of a deal for me the first is with the protective case I would have liked it to have some padding or something in the inside to keep it firmly in place to stop any movement. My second this is probably just me but I am not that keen on the range starting from ND32 I would have preferred from the lowest possible at a push from ND8.

Also so far I have had no issues removing this filter from the lens which can be a problem with variable filters

Overall I am happy with this variable ND filter.

I use the filter both for filming with DSLR and for long-term exposure during the day with an open aperture, especially when filming, it is simply beautiful with an open aperture. The ring can be easily turned. The sound should be recorded externally, because the ring clicks quietly in the intended positions .. The packaging is great for transport and can withstand the attacks of my 1 year old daughter. The image quality looks good. At least I could not see any tint or other disturbances. I am very happy with the ND filter.

Works exactly how I hoped it would. I mainly bought this so I could do more filming outside with a lower Aperture setting. This is perfect for just that. Tested it out as soon as I got it. Attached are 3 photos and 1 video that displays the quality of this item. The first photo is with the lowest ND filter setting (ND 32). The second photo is the highest setting (ND512). And the last photo is with no filter on the camera.

Camera Settings
1/50
ISO 100
F1.8

Time of day - 5:15pm

I ordered this filter for my Canon 800d and it works like a charm. The packaging it came in gives you an idea of ​​the product's first-class design. Since this is a variable Nd filter, I can leave it on my lens as the filter does not have to be removed to get more light. I had high expectations for this filter while ordering, and the results are better than my expectations. The filter ring is very smooth and does not jerk when recording video. There were no dark spots on the pages of my photos that I have experienced for any other filters, the Prime delivery was very fast and the product arrived safely in one day. I would definitely try other K&F Concept products as the ND filter meets the requirement.

I bought the filters to expand my collection. I have now found the right ones. Delivered very quickly and came in a very stylish packaging with magnetic closure. The filter itself was packed in a high quality plastic box. Using adapter rings, the filter was quickly attached and did a great job. Easy to use and great workmanship, I can recommend it to anyone looking for a filter.

No vignette and very easy to use.. You can feel it on your hand and easy to adjust. Have some stops in both ends so much better than many other solutions