Great. Good quality and highly recommended

What to expect from this type of filter

These aren't cheap, but Lee Filters are a bargain. The filter holder is excellent and comes with several adapter rings which are £26 each from Lee. I don't see any significant color cast. So if you want to experiment with proper filters without breaking the bank, these are a good buy. The filter cases are beautiful and the entire product presentation/packaging exudes quality.

A complete ND1000 filter holder and filter set. The filter holder contains several rings for different diameters that cover virtually all of my lenses. It is robustly built and easy to attach to the rings.
Regarding the filter, it corresponds to the promises. Good quality of the same and hardly has any color dominance.
The filter holder and filter set have a knockdown price and quality at the level at which this brand is used, perfect for beginners and non-beginners.
I also included a 6-stage filter in the purchase to complete the kit and my opinion is the same. In addition, both have a faux leather case that allows you to store them without damaging them or knocking on the inside of the backpack.

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.

I’ve been wanting an ND Grad filter for a long time, decided to go for the K&F as all of their other items are great value for money,
I wasn’t disappointed when I tried this,
Overall highly recommended

I haven't had the change to do real world testing yet but I've taken a few test shots in my garden to check for loss of sharpness and color casting. I used a macro lens for checking fine detail and wide angle to see if its consistent across the frame. I also checked it against my Lee Filters big stopper.

I couldn't find any percievable loss of sharpness across the entire frame with the macro or wide angle.

There is a bit of a color cast to it from looking at the exif data but shooting in raw the camera adjusted it out for the most part and can be edited out manually if required. Importantly though it seems to be consistent across the entire frame, even at 10mm on my apsc sensor.

I did experience vinetting on the wide angle (both 10mm and 22mm) but again it can be edited out very quickly in lightroom.

It would have been nice if it came with a light gasket supplied with it but for the massive price difference compared to the bigger brands I can forgive them for that. They can be purchased online elsewhere if required which is what I'll be doing.

Overall I'm pretty happy with it, which is just as well really as it managed the slip through my Lee Filters folder when I wasn't paying attention and drop onto the paving slabs in my garden, which chipped the corners of the glass. That's my own fault though as it's a known issue I have with the holder, I experience the same problem with my Nisi filters in my holder so I think it's a bit worn out.

Quality filter, there are 5 steps, it is convenient for sunny days, it comes with a leather case with a magnet to close it, the filter is made of glass and not resin, the quality and price are luxury, I have more expensive filters from other brands and they are worse.

I just got back into photo mode. So the new DSLR setup. I've never used an ND filter before. I'd like to try that. This filter does what it is supposed to do. As a newbie to ND filters, I think this is a good build quality.

have a Sony A7III with some of the Tamron lenses they recently released, 67mm thread on the dUKx. I first used the ND on a daylight midday shoot and was amazed by the results. The best part is that I can choose the number of stops I need to make the zebras disappear with ease. Ease of movement and robust construction. Only negative is that the sun visors don't fit after turning on the ND. Not a deal breaker but be aware. EDIT: I also took it with me on a trip to Lake Tahoe and it came in really handy for longer exposures and more sky contrast. Awesome and so easy to use!