About the filters (ND 64 + ND1000):
Perfect quality, no color cast. The leather cases are sturdy and protect the filter plates.
Of course, I didn't want to test their scratch resistance, but it should be many times better than plastic filters.
The sharpness is not affected.
The filters fit very well in the holder.

The holder is sturdy and can be removed very quickly thanks to the push button, which can be helpful if you want to double-check the focus, for example.
I also like that it has two slots instead of three, so it doesn't take up too much space. This could otherwise be a problem with very wide-angle shots.
A big plus because all ring sizes are included, and you don't have to buy each ring separately...

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.

..works perfectly with the K&F filters. Great value for money! Would buy again.

Scope of delivery:

- ND64 filter 100mm x 100mm
- Synthetic leather case for 100mm filter
- Padded cardboard box for filter case

Very high-quality 100mm x 100mm ND64 filter with a measured thickness of 1.85mm.
The images look very promising even with sharp fixed focal lengths – it's a pleasure to shoot with. I don't notice any reduction in quality due to the filter.
The extremely attractive and high-quality packaging is also worth mentioning. It comes in a synthetic leather case lined with fine fabric on the inside and has two magnetic snaps. This case, in turn, is housed in a beautiful padded cardboard box.
I haven't worked with ND filters before, but I don't know what I could complain about. The price is also extremely fair in comparison. Therefore, I give it full marks and recommend it.

This is my first ND filter, and I'm completely satisfied.

It darkens the scene by 10 stops, allowing you to comfortably take long-exposure photographs in full daylight. It's made of glass and looks good quality.

I've used it with my Sony A6000 and haven't noticed any noticeable cast or aberration.

It comes with a leather case, lined inside with a soft, velvet-like fabric, which is great for transporting it without fear of scratching.

K&F filters are value for money. Deliver the quality a photographer expects.

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.

good quality . highly recommended

Great product

I thought is was great. I just ordered one a little too dark. I really needed a ND8