am a passionate landscape photographer as a hobby and have now switched from the screw filters to this rectangular filter system from K&F. The screw filters were all fine, but you don't have the option of attaching a graduated filter to the ND filter in order to achieve even nicer effects. It is mounted on the lens using so-called adapter rings, which are included in the most common sizes for lenses. After attaching the adapter ring to the lens, the filter holder is attached. This is secured by a small lever (spring-loaded) and later released again with this. Now you can slide the filter plates into the filter holder. This lifts a bit severely but it should also hold and must not wobble. It is also important to observe that the filter used is close to the lens so that no more light can penetrate between the filter and the lens, which could possibly ruin the recordings. In terms of quality, the system makes a good impression considering the price. The only thing I noticed negatively is that the filter holder has some play after it is placed on the adapter ring and why there is no adapter ring for a 55mm filter diameter in the set, I also ask. 55mm is a common diameter for lenses. I can highly recommend the K&F system for amateur photographers. The professionals will probably use filter holder systems from other manufacturers, but they also cost a lot more.

I've been using the product for about half a year (almost daily) and I'm very happy with it! Pro: The installation is easy and holds very well and with the installation rings it can also be used universally for every lens! The filter also keeps its promises and the quality is still excellent! Contra: the glass is a bit difficult to slide in, if you want to push the filter in, you should remove the attachment to avoid damaging the thread! Conclusion: I am very satisfied with the product, even if you have to be a bit careful! I give this product 8/10

Awesome filter, but only 2mm thick. Still, great optics for the price.

What I photograph with it is great. The bag that comes with it is also very high quality. From me there is a clear purchase recommendation.

This is a more affordable alternative to the big names and I'm very impressed with the quality so far. It is shipped in a nice box and encased in its leather protective pouch. The pouch looks and smells like leather but I would be surprised if it actually is at this price. Regardless, it is nice quality and should hold up for a long time. I like the strong magnet closure as it is silent to open and close out in the field and strong enough to keep out dirt and dust. The filter itself is real glass and it is multi-coated as I can see color reflections when I turn it to different angles in the light. I have used it for one roll of film so far and it has worked well. Making exposure adjustments for 10 stops results in proper exposure so it is rated properly at 10 stops. I cannot comment on any color casts to color images as I only shoot B&W film.

Awesome quality would definitely order again.

Works great.

I used the K&F ND1000 MC 20 filter for a short film production. It's drastically dark, but a solid filter when needed for a day shoot, that otherwise would have been washed out with too bright of a background. Great for keeping a creamy bokeh at a very low f-stop. I'll add pictures later. Comes with a protective leather and padded pouch.

sorry not managed to use it yet

ordered this filter for my Canon 800d and it works like a charm. The packaging it came in gives you a sense of the premium build quality of the product. Since it is a variable Nd filter I can leave it on my lens as there is no need to remove the filter to get more light. I had high expectations for this filter while ordering and its results are better than my expectations. The filter ring is very smooth and does not stutter when recording a video. There were no dark spots on the sides in my photos which I have experienced for some other filters. Delivery by Prime was very fast and the product arrived safely in one day. I would definitely try other K&F Concept products as the ND filter does the job.