I got this for the filter holder and adapters. They work great!
Mad the filter that came with it is pretty decent.

Love the rapid release frame and the secure fit of the CPL, along with the easy rotation. No evidence of colour cast when stacking filters. Carry case is good quality also.

The filter set. The filters are individually in a beautiful leather case, with magnetic closure and labeling card have a good color fidelity, I've tested them all a few times and I'm satisfied.
Purchase recommendation from me. (especially with the offer, with all the adapters + 4 filters it's always better, but that's good for me too) it's fun with it. With this offer, the price-performance ratio was great.

The picture quality on these filters is by far ahead of variable ND filters. I am a videographer and rely heavily on ND’s to get the shots I want.
They are super Sturdy and the I love the case the filter came in. Not to mention having this on your rig looks really cool!

Visually, the filter set is of very high quality. The optical quality will have to prove itself, but I don't have the slightest doubt about this.
The only point of criticism is that the very nicely executed leather storage box/pouch is very large in size, which makes transport in a backpack almost impossible. It would be better to provide the filters individually with a protective pouch. Transport would be easier and more customizable.

This is a very versatile system and a quality product. The tabbed filters slide in and out of the holder without difficulty. So far, no light leaks. I love the ability to get frames for my additional filters, 100X100 and 150X100. It keeps fingerprints off the filter.The company is based out of Hong Kong. I would have liked to get additional adapter rings, but the company does not sell them separately, or so it seems. I've contacted them via their web site/email address and keep getting ads for their backpack. I was referred to get magnetic adapter rings which are not for this system. It appears if you want to get adapters you need to buy the filter holder and adapter rings.This is definitely a product to purchase. I look forward to shooting pictures with it. It would be nice to have a wide angle lens shade, but then, you can't always get what you want.

I have been an avid photographer for over 40 years but have never really wanted to use filters before now, always preferring to keep my images as natural as possible, except for maybe the occasional minor tweak in post production. However, recently I decided to take the plunge and invest in some filters to help
achieving the correct effects with low shutter speeds and landscapes. I undertook a lot of research, including all the main brands Lee, Cokin and Nisi etc, especially as I needed a set that would accommodate a relatively wide angle lens too, so I was looking at the 100mm to 150mm sets. Eventually deciding I could just about manage with the 100mm set, as I didn't really want the expense or bulk of the 130mm/150mm sets. I discovered the K&F brand which I had not heard of before, and in what I read and watched I was very impressed. So I eventually decided upon this Pro 3 filter set, 10 stop ND, Grad ND and Circ Polariser. It was expensive, but good value when compared to competitors for a set of similar specification.
So what is the set like, well it is very impressive. It arrives well packaged in a very professional looking box, orange and black. Inside is the leather effect protective case, which contains the 3 filters, the ND & GND in frames (each individually wrapped too for extra protection in transit), the filter holder, the lens adapter rings, and a simple manual. The holder is aluminium and feels very strong, it has a very professional and functional design, and the subtle orange accents (to represent the K&F brand) on the both the CPL rotation wheel and the adapter ring locking nut are striking. The filter frames that encase the glass filters are very thin, but they feel solid enough. They are pre installed on the 2 square filters provided (ND/GND), but reading the instructions they do 'appear' to dismantle to enable use on other similar sized filters. This is still a very new product I believe, so hopefully they will be available in the not too distant future. I look forward to them being available as I expect, given the quality of this set, I will be expanding my collection of these filters at some point in time.
To use the filters, you simply attach the relevant adapter ring to your lens, then attach the filter holder, and then put the required filter(s) in. The CPL is locked securely in place from the top by an ingenious locking mechanism and it can be rotated when in place by the wheel at the side, which is really cool. The square/rectangular filters then just slide in front of it, in the 2 available slots as required. The filter frames have a very reassuring fit & hold when in place in the holder. They also have raised tabs at the top and bottom of the frames to help with vertical adjustments, and also help to keep the glass clean by keeping fingers away. So far I have only done some very basic test shots but the results have been excellent, so I am really looking forward to testing this set fully in the coming days/weeks, and hopefully producing some great results.
Overall, I have been really impressed by the quality of this product and of the K&F brand. So good was the workmanship I am just awaiting a new K&F tripod which I hope is just as impressive. The build quality of this Pro Filter set is excellent, great value for money and it certainly looks very professional, so I can say with confidence that I really look forward to using more products from K&F.

I bought the rectangular filter set directly from K&F. Since I have worked with screw filters in the past and had 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. It's amazing what K&F delivers here.

I wanted a filter holder with these characteristics and an ND filter to start my first steps in long exposure. I chose this brand because I usually like what it offers (and, especially, pretty much adapted for the price it offers) A sturdy metal filter holder with a safety trigger to place on the adapters and an ND 1000 filter that works perfectly is to start with this type of photo even in the light, see the photos, it comes with a leatherette cover with a soft velvety inside so that the glass and the filter holder are not damaged, even though it is presented in the box without a cover.

For a while I had been hesitating between several brands to choose a filter holder for ND and GND filters. I took advantage of a flash sale to buy this kit. I am not disappointed.
The set seems sturdy and easy to store.
The case, quite pretty, has 5 compartments, 3 of which, for square ND filters, are raised via a ribbon. On the back of the case, there is a belt loop and a belt loop. I would have liked a slightly more spacious compartment to house the adapter rings with the CPL filter when it is removed.
The assembly (or disassembly) of the elements is well explained in instructions in several languages, including French.

Main positive points:
No dominant color, nor loss of sharpness on the first tests carried out.
The plastic frame with its tabs to handle ND filters.
The system for installing the PLC filter on the filter holder.
the knurled button for mounting the adapter ring and for rotating blocking the filter holder.
The very accessible wheel to control the polarizing filter.
The sturdy holding of the square filter on the filter holder.
The robustness of the metal filter holder.

If you have to find slightly negative points: Keeping
the square filter a little too sturdy in the filter holder.
The click too loud to lock the CPL filter in the filter holder.
No pouch to independently protect the CPL filter in the case.
No protective cover for the CPL when the set is installed on the lens.