I purchased the K&F Concept 46mm Variable ND prior to my vacation to San Antonio, and I was super impressed with what this budget filter could do!

Any aspiring photographer knows how tough it is to film and take photos in bright sunlight and not have everything over exposed. This variable ND was the easy to answer to my run and gun filming style while I was out and about on my vacation shooting my Vlog.

I definitely recommend this product to people who need lens filters for their shoots. Comes in a nice protective case and fits easily in my camera bag!

Ill start off by saying I am no expert. The majority of bad reviews are because people do not understand that these adjustable filters are not supposed to be used to their full capacity. Any filter will start giving issues when turned to their max. With that said, just practice with this filter first and know its limitations. You will be a happy customer if you do.

I was reading reviews for other ND filters and found this one for the price to work great for what i will be doing. The build quality is really nice, it has some weight to it so it feels strong, the glass is really clean and it works perfect, I got this for my 35mm 1.8 and it allows me to take pictures and shoot video in full daylight at a wide aperture of 1.8 with an even balance of blue in the sky to the greens in the grass. I was really impressed with the quality of this filter. I will be getting another one for my 50mm 1.8. I'm using it for mid day long exposures of waterfalls and cloud landscapes. Also this helps give a cinematic look for shooting video which looks really nice! I didn't see any noticeable loss of detail in images or video which is what i was worried about. I did NOT notice any kind of X or shadowing from this filter. It is probably from using a wide angle lens. I highly recommend this ND filter!

Trying to shoot a long exposure photograph around sunset or sunrise with a standard ND filter can be a challenge. However, with this filter I was able to easily adjust to the changing light condition and keep my shutter speeds where I wanted them to be to ensure that I was able to capture the light trails of the cars in their entirety. The filter did not produce a color cast which is excellent for a filter in this price range. The team at K&F have a winner on their hands with this filter.

Filter works great. Yes it gives an "X" image, but only if you go past MAX, which you shouldn't be doing anyway. True neutral gray, does not affect image or color quality. Solid construction. A good filter to have on hand.

Bought this hoping to solve the need to stack filters and it’s better then that! It solves the infinite nd filter spinning. With most variable nd filters you just keep spinning around and around, so you end up with those dark x shapes and other issues. This filter has markings and a lever that stops at both ends of the variable nd, meaning you don’t go to far and ruin your shot. Is it the best image quality in a filter (probably not) but it also isn’t 3-400 bucks. So it’s killer for value

I have used numerous filters, from Cokin, to buying several for different sized lenses. And, I do a serious amount of light and strobe painting (do a you tube search, if you're curious). So, when I dropped my super expensive ND filter, I was crushed! Right up until I found this K&F Concept ND, which offers a "Variable Neutral Density". Imagine looking at purchasing an ND Filter for the Typical four hundred bucks (and, that is only for a single fixed ND number)? Oooor, grabbing this well constructed, high quality ND filter that you can adjust to your liking ON THE FLY! Still thinking...
Buy it Bonehead!

UPDATE: I was approached by a company representative and offered a replacement filter. I received it today and did a quick test. This filter seems waaaay better. It doesn't have any shadows in the corners or any black spots when shooting towards a light source. I haven't tried it out in the field yet, but it looks like it'll be alright. Either way, impressive customer service.

ORIGINAL: After reading all the reviews I decided to purchase this filter because my budget was tight. I used it on 24-105 f/4 L lens to take some photos at sunrise and sunset. It's absolutely terrible. There is a black shadow on the right side of the filter that gets stronger with each step. I wish I could return the filter but I've already threw away the packaging:( Will have to throw this filter away as it's completely unusable...

This filter is the bomb! I use it in broad daylight to slow down shutter for that cinematic look. My videos have been coming out nice as of lately. This is actually my second time purchasing this same filter for a different camera. Highly recommended for those who want to master their camera & shoot only in manual...

This filter definitely works as advertised. I researched exhaustively and checked many reviews before purchasing.
Comes in a nice plastic box with some foam cushioning; I added a layer of thin foam in there to keep it from moving around in my bag.
I'm in Florida - took this outside mid-morning, full noon and afternoon, and on an overcast day. Outstanding results, including with flash. On sunniest days I did not crank it up to the maximum setting, just below, and still got great results for both stills and video.
Shooting on a a Canon 6DMII, got three lenses that'll take this 52mm.
Not a 'pro' but half of my income comes from photography and video.
Would definitely recommend this filter - I feel kind of dumb not having gotten it years ago, could have saved many shots.
I found this after seeing the versatility of a variable ND demonstrated in a video, realized I must be missing something. When I looked up that item I was astounded to see that the low-end for that series prices about $250/$300. If you're making museum or some kind of major publishing landscape images you probably don't think twice about that, and I'm certain those pieces are quality. However, if you're reading this then you've already come across a couple of childish and self-important remarks about how this item doesn't compare to 'pro' or 'real' filters. You're on Amazon here - this thing works, give it a try.
Finally - have seen a string of reviews with tantrum-like rants insisting that this filter doesn't work and puts an 'X' on the image.
I'm guessing that's true ... because in the little page that comes with the filter (and the description online) it's clearly stated that turning the filter up to it's highest setting will create this artifact, so they kind of advise you not to do that.
Also, if you cross the street on a red light, you will likely get run over.
It's working for me!