I have other K&F's and they all perform as advertised. This one is no different. Well made, good images, works as expected.

"Real" photographers, such as Rick Sammon can't say enough bad things about variable ND's. I have used them for years and never once was disappointed by them. The bad mouth guys are always complaining about the "X" issue. Yes, if you turn too far, you'll get an ugly X across your photo. Here's the secret which as served me well for a long, long time. You ready? "Don't turn it too far". I don't know why that is such a tough concept to master. Of course, the lazy manufacturers could help the situation by putting stops on the filters, but they seem to prefer the complaints to a simple, positive move. For my part, I help myself by gobbing on some white nail polish on the three points in question, so I can easily pick out the "too far" points. I can turn it down to focus/compose, then turn it up to where I want it and shoot. That beats the heck out of trying to shoot the image blindly, or repeatedly screwing and unscrewing the filter to get the shot arranged.

Really, a reasonable price, a little common sense, and you'll be good to go with this filter.

I hope you found this information useful and/or helpful.

This one helps to keep colors true.
Have you ever tried to photograph purple sport’s uniforms? Without this filter, they often come of digitally as navy-blue uniforms. This filter is a problem solver.
Ever photograph polar bears in the snow? This filter helps keep all the shades of white clear and precise.
I label each box with what to expect from the filter.
It makes it easy to grab and go with the correct filter.
However, when I have time, I enjoy changing out the filters and shooting the same scenes with different filters. It often yields unexpected and lovely results.
Essential filter. Well worth the time and expense.

I'm really super satisfied with the K&F Concept ND filter, it looks high quality, price-performance is great and I've been able to use it many times. Thanks to the scaling on the outside, the permeability can be adjusted very well.
Gladly again

Love it. Easy to use. Points must be used for correct alignment. Moving to the Min/Max mark creates the "X" you see in some photos. This is pure user error. I've done it myself. What I love about the variable filter is that I can set this filter to the lowest setting on my lens, set up and focus my shot, and then crank it to the maximum setting to capture my shot. The filter does not need to be removed to set up a different composition.

Photo: Nikon D7100/ Sigma 18-250mm
Iso 100
Shutter 1/6 sec
. f/4.5 (I think)
Nd - highest setting

Was rushing to take this shot as I was being eaten alive by black flies. So I screwed up my aperture and cranked up my shutter instead to get an acceptable exposure. I also had some condensation on my lens when I unscrewed the filter so there is a haze to the top of the image. Should have used f/11+ and a 1 second exposure but the water still mixed well.

Variable ND filters are not recommended very often. There's the argument that the darkening range is too small, that it's more universal with a square filter that you can put in front of any object using an adapter... And finally, there's the argument that they often have a slight color cast. Which cannot be dismissed out of hand with these. I noticed a very, very slight green tinge.
Variable ND filters were developed for filming, because the lighting conditions change frequently and can be adjusted very quickly by rotating them. The slight color cast can be quickly removed in image processing. I find these filters good for my purposes, because I can experiment with the different darkenings due to the variability, the filters are inexpensive. I bought them for my most important lenses. Not only are they good for long exposures, but also when it's very sunny. By using them, I can achieve longer exposure times. This also applies to portraits. These filters can be easily screwed into the thread and - what is really important - also unscrewed again. Anyway, I'm looking forward to the first long exposures with it.
I've also heard that the screw filters can cause vignetting. These are also easy to remove with image editing. Moreover, they are even "modern" at the moment.
The filters now accompany me in my first steps in the field of long exposures. If I feel more professional, maybe my equipment will become more perfect. Now, however, I look forward to working with them.

After I needed a new gray filter for my DSLR, I decided on this model and was not disappointed. I am an amateur photographer. Pros may have different needs, but I wasn't disappointed.

That thing is ridiculous! Received it yesterday and took it out today for some waterfall pictures in a small creek nearby. That was around 5 o'clock in the afternoon. Nice bright sunny day. I was able to shoot 20 second shots with no problem and could have done longer. I got some nasty flares on some of my images but I think that was my problem as I was shooting towards the sun and it's not on all of my images. I'll have to try again and take a picture with the sun behind me and see how it works. But for the price, there's no reason not to have one for each of your lenses. Very happy with it. And it is beautifully made of metal and screws in smoothly.

long exposure. At first I hardly used it, now I'm a big fan. I looked around and found the perfect tripod (carbon fiber Manfrotto, great too). When that caught on, I mentioned to my friend that I was planning on getting waterfalls with a slow shutter speed and he said, "You need an ND filter, don't you?" I knew there was a trip to Letchworth coming up this weekend. That evening I went to Amazon, made a purchase and found this product. Perfect size for my Zeiss 50mm and 35mm!

Didn't really get a chance to play around with this ND filter until I got to Letchworth and wow I was blown away! The crisp rolling ring and crisp black tone make this such an incredible product. So worth the price! I'm blown away by how it doesn't affect the quality of my shots that my lenses can achieve.

Now I love long exposures. With my light tripod and my filter I can only grow.

I've attached an image of a covered bridge in Cuyahoga Valley National Park taken with this filter. It was an eight second shutter speed.

I almost gave up investing in an ND filter because I wasn't willing to shell out $200 or more for a few waterfall shots. Stumbled upon this one and loved it. I took it with me on my trip to Italy and it gave some phenomenal shots in full daylight. It worked great both with 30 second exposures of waterfalls and when I just needed it to block out the haze of the rising sun on the top of St. Peter's Basilica. Sure, there may be a shadow around the edges, but the overall quality of photos this offers is worth it.

Very easy to use, looks very good material. i love the result. If you play with the white balance you can get much better results. I tested with ISO 100 f/1.8 and 1/125 sec when the sun doesn't show anything in the camera and this allowed me to set it totally dark and also to a desired tone.