The filter pack is well made and designed to be protected. The filter removal system is practical, pleasant to use and useful for controlling the high tones of the sky, etc. In my opinion, it will be very important to choose a metal filter holder that precisely blocks the mounted filters.

What to expect from this type of filter

Very good construction, all metal. It fits correctly.
The problem is the price, which is a bit high.

I informed them of these issues even though they were purchases made 18 months ago. They have since sent me a completely new holder with the missing part attached.

Excellent service. It's still worth checking when it arrives in case something else slipped through the cracks during production.

Gap between glass filter and filter holder. Not ideal if the purpose of an ND filter is to reduce the light entering the lens. Needs some work.

Well presented lookswell made pouch is nice touch oasis, t tried it yet for color casting but for the price I don't expect Lee quality give one a try

As the title suggests... Great metal filter holder. Excellent packaging, K&f, proves that it is a company that paints materials of excellent quality, no longer an alternative to the most famous filters, but first class! Recommended

The gray filter comes in a sturdy protective case and fits exactly into my Rollei rectangular filter holder. The optical properties do not reveal any errors. A satisfied customer thanks you.

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.