No complaints - every photographer will point out the usefulness of a rectangular filter. But: I often take the camera with me on hikes. There the focus is on the hike, not the equipment. I don't have the time to use a rectangular filter and take the perfect filter photo. But the filter does what it's supposed to do: It fades out the overexposed sky so that the remaining colors of the picture don't drown in darkness. Without filter screwing - a real enrichment of the picture quality without wrong compromises and material battle. Clear recommendation!

Very well done...I used to buy Rollei filters but when I compare the quality of Rollei to K&F I have to say that K&F Concept is far superior. The item was dispatched the next day and arrived very quickly. No complaints.

It has a good quality and is super processed. The leather case is very chic and protects the glass.

I discovered it while on vacation this summer.
qualitative filters that do not exhibit colorimetric drift.
makes it possible to compensate for differences in exposure and increase creativity.
I recommend.
The product is as expected and met my expectations. Everything as I wished. Everything is very good.

Very good value for money, the filters work very well and are of very good quality. Even if the product is expensive, it is worth the money. High-quality workmanship, sufficient adapters in the relevant sizes, the holder and stable transport protection once again speak for K&F Concept.

The filter set will be expanded shortly - the basis is already awesome. The bracket is "all of a piece" - the filters are really tight and can be adjusted as desired. The filter itself is made of glass, not plastic - simply top quality!

This has been added to the K&F filters I already use and is exactly what I expected as it is excellent photography gear. Meanwhile, K&F has outperformed even the most popular and well-known brands in terms of quality with its filters, and it shows! Undeniable optical quality, lack of chromatic dominance, etc. And quality pays off, in fact they even cost more than other brands, but for those who want the best and use professional equipment, this product is excellent, I highly recommend it!

Had screw-on filters for years. Of course they work, but a plug-in filter is really practical, especially for landscape photography.
I first bought the filter plug-in system from K&F (Nano x per row).
Now have some filters.
Filter and plug-in system highly recommended. I'm really excited. Goes fast, good quality and you can also leave filters on if you want to go a few steps further.
I also like the frame around the filter. So fat fingers don't get on the filter so quickly. Nothing wobbles.
There is also a stylish filter bag.

I like using it on long exposures, beaches, rivers, etc. The package arrived very well packed, serious seller. Certainly we have in front of the most versatile and user-friendly GND filter of them all. Extreme glass quality, complete absence of dominants and really useful gradations in the field, especially at dawn and dusk.

I bought the rectangular filter set directly from K&F.
Since I have worked with screw filters in the past and got the problem with vignetting when screwing several filters on top of each other, I have wanted to buy a rectangular filter set for a long time.
Since the sets from NISI, Haida and other well-known manufacturers are very, very expensive, as a hobby photographer I was looking for a cheaper alternative.
When I saw several reviews on YouTube, I decided on the K&F set, which is half the price of Haida and CO.
I have absolutely no regrets about my decision.

The filter holder is very valuable and well thought out.
I particularly like how the polarizing filter is attached to the holder and how it can be adjusted using the small wheel.
The filters themselves are made of optical glass and show no color cast and are also well coated.
Another positive aspect is that the filters have a plastic frame with a tab.
This allows the filters to be inserted and removed without annoying fingerprints.
A bag is included to store and transport the holder and the filters in it.
Also included are various adapter rings for different filter thread diameters.
As a landscape hobby photographer, I no longer want to do without the advantages over screw-on filters.

I give a clear purchase recommendation for amateur photographers and professionals too!
I wasn't expecting such excellent quality for this price.
Crazy what K&F delivers here.