very easy to use

I tried it and wasn't disappointed, easy to use but was too big to carry around for my type of photography unless you use only one lens, but it's too much headache when you keep switching lenses.

So i returned it and went with the magnetic filter from same brand which is perfect for me.

The filter does what it should, it extends the exposure time. A Vignettietierung or wrong color reproduction I could not determine so far. The packaging of the filters is very good and practical, some higher-priced filters can not do so well.

I was really looking forward to it, everything is packaged beautifully and with high quality, so you can't say anything really great

This is ideal for my photography as I only need one set of filters to fit all my lenses.

Filter holder for 100mm x 100mm filters - adapter ring 67mm - adapter ring 72mm - adapter ring 77mm - adapter ring 82mm - padded cardboard box for filter holder The set makes a very valuable impression overall. The adapter rings are made of black anodized aluminum - they are well made, not sharp-edged and the thread can be easily screwed onto lenses. Apart from the filter inserts, which are made of plastic, the filter holder is also made of black anodized aluminum. Here, too, the workmanship is excellent. Perhaps the quality of the plastic inserts could be a tick better, but that is already lamenting at the highest level. The slots fit all 100mm x 100mm filters with a thickness of 1mm - 2mm. Packaging was perfect; Adapters are packed individually; The filter holder is in a nice, padded cardboard box. Full score and recommendation for a flawless rectangular filter system at a significantly lower price than with some other manufacturers.

Very high quality ND1000 K&F Concept square filter set consisting of glass filter, filter holder and lens adapters for the filter holder.

The package is divided into 3 parts:
1. a bag with metal adapter rings for lenses with different diameters.
2. a box with the filter and its leather carrying case.
3. a box with the filter holder.

The adapter rings allow us to put the filter holder on any lens, since we have a large number of different diameters. They are made of black metal and well made. With inscription on each ring of the corresponding diameter.

It is a square filter ND1000 100x100 mm and 2 mm thick. It allows us to remove 10 light levels to make long exposures in daylight perfect. In the example photo I posted, it is taken at noon at 30 ". I love the play that can be taken from this filter.

The filter comes in a leather case and is covered with tissue paper. The case is sturdy enough to protect it properly.
The glass is not easily marked by fingers and does not attract dust.

The filter holder is metallic, with the part where the filters rest being made of some kind of very hard plastic. They easily fit two 100x100 filters

I loved the quality of the materials, all metallic. I looked at many kits but they were all plastic and this one in particular caught my attention from the comments. The truth is that it was a success because any other similar kit does not fall below 300€.The nd1000 optical filter is made of glass and gives a very good quality. The only thing I noticed is that it loses a bit of saturation and the white balance is a little bluish, but when processing the RAW it's easily remedied. You increase the color temperature and saturation and you're done!! (I use a Canon 80d + 16-35 f4's). I imagine each optic will be different. Attached some photos so you can see the difference with filter and without filter. Exposure time on the photo with the 30" filter. If you want to start in the world of filters, for this price don't even think about it. Excellent results.

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 loved the quality of the materials, all metallic. I looked at many kits but they were all plastic and this one caught my attention especially with the comments. The truth is that it was a success because every other similar kit doesn't fall under 300€.The nd1000 optical filter is made of glass and gives a very good quality. The only thing I noticed is that it loses a little saturation and the white balance is a little bluish, but when processing the RAW it is easily fixed. You increase the colour temperature and saturation and you're done!!! (I use a Canon 80d + 16-35 f4 is). I imagine every lens will be different.Attached a few photos so you can see the difference with filter and without filter. Exposure time on the photo with the 30" filter.If you want to start in the world of filters, don't even think about it for this price. Excellent results.