Great price. Works as advertised on my Lumix FZ2500. Arrived on time.

I found this filter too hard to use effectively, because I couldn’t tell how much ND I was applying. The filter seems less practical than I expected, because the outer ring keeps turning and I wanted to feel a ‘stop’ point. Company was responsive when I contacted them and they suggested I return it, which I did. I have ordered a different ND kit from same company that includes individual ND filters.UPDATE: I ordered and received a different kit from this company and I’m happy with it and their service, so I am changing my rating to 4 stars.

Used for beautiful eclipse 2017 photosSays it can be used to increase depth of field in bright sunlight. I haven't tried this yet

I really enjoyed using the Filter, it was really easy to use and came in a nice case. The added lens cloth was an appreciated touch. As a person who typically does not use filters or ND filters it was a new experience for me using the filter. Comparing the cost of some of the more expensive filters I was happy with the K&F concept filter. Although I did notice some abnormalities at the darker settings when using it to pull down a stop or two it was quite a joy. The filter was not gummy or difficult to rotate on the lens, going on the camera was easy and smooth. The glass appeared to be very clean and of a higher quality than some of the other cheap filters I have seen others using. Overall happy with the filter and will continue to use it on my camera in those hot sunny days to get an extra stop or two of light out of it. The photographs I took with the filter were in downtown Chicago on a very sunny day testing the filters ability, while noting the filters abnormalities in light on darker settings the lighter setting were enough for me to get my aperture where I wanted it, all I really wanted from the filter which was nice. Again happy with the product would recommend to anyone looking to buy a filter for the first time to try it out.

Great service. Just what we want.

This works beautifully with no X imaging as you approach full light reduction. The rotation is smooth and the optics seem to be of surprisingly good quality for the price. I'm very satisfied!

I'm just a novice photographer, with limited experience using filters. That being said, I know my way around exposure settings and fairly literate with the technical specs of my cameras.I wanted to take some smooth pictures of waterfalls and saw this variable ND filter with good reviews. On the item description page, there's plenty of warnings to make sure you buy the right filter thread size for your camera, which seems pretty obvious. However, they don't mention that this ND filter is poorly suited to wide angle lenses. For reference, I had paired this filter with a Zeiss Touit E 12mm f/2.8 mounted on a Sony a6500.After coming back from vacation, I realized that many shots I took with the filter mounted had pretty poor light uniformity. I did notice while taking the photos that rotating past a certain point produced noticeable unevenness, but the effect was less/not noticeable when I turned the ND down. However, upon checking the images on a computer monitor, it was obvious that the brightness is not uniform.I asked the seller about the issue and copied/pasted their response below:"Darkness is a common issue with wide angle lenses and variable ND filters. Physics limit the capabilities of variable ND filters on wide angle lenses. When you enter the edge of the max range,the darkness may appear on your image. Because you are using it beyond its capability according to the laws of optical physics,which will inevitably cause this phenomenon. could you try to turn down the degree until the black fade away?"So I guess I'll chalk this up to inexperience on my end. Still, I'm docking 2 stars because it's not documented anywhere on the item page which focal lengths are supported, which can lead to some mislead some buyers. Also, it's not really feasible to tell if there is a slight amount of uneven brightness while taking the shot or previewing in camera. Thus, you can end up with a bunch of bad shots that you wouldn't know about until you get back to a monitor.

perfect

Works wonderfully, as I used it for the eclipse, with an additional ND fader on top, much like an 18 stop stop filter.

I bought this kind of last minute for some video work I was doing for a church camp over the summer. Because I would be shooting outside the majority of the week on a Sony A7s I realized I needed a ND filter pretty quick.This one did ok but had some drawbacks. Most notably was this vignette that would appear as I would increase the shade on the lens. It didn't look horrible since I was just doing daily videos for a church and it got the job done for relatively cheap and on short notice. But I would not use it on any kind of larger shoot.