Trying to capture a long exposure photo at sunset or sunrise with a standard ND filter can be challenging. However, this filter allowed me to easily adapt to the changing light conditions and keep my shutter speeds where I wanted them to ensure I could capture the car light trails in their entirety. The filter does not produce a color cast, which is excellent for a filter in this price range. The K&F team has a winner with this filter.

Filter used on a sigma 24-35. Très pratique en variable pour faire des poses longue en journée.

Je cherchais un filtre de ce type pas trop char car ce n'est pas mon activité première ce genre de photo. Celui est parfait et pas trop cher !

Convenient for older manual film cameras with a maximum shutter speed of 1000 or 500/sec for measuring in sunny daylight with the lens wide open. Metering can be adjusted by rotating the ND to achieve the correct exposure at a set shutter speed and chosen combination of DOF (f-stop). Wonderful tool for needle actuated or LED array cameras where you can see the exposure progress as you rotate.

The retractable rubber hood is the best solution to attach a hood.
The lens cap for a 67mm lens is 72mm. I assume 1 size bigger.

I bought this filter, tempted by the low price and the fact that it is small and light and allows me to have several panels together in a single accessory, since I already have panel filters and in addition to 150x150 that are really uncomfortable too are wearing.

The product looks very well packed in its case, it is very light and made of metal material with the various notches that indicate the ND phrase. Maybe I would have preferred to have actually written about how many stops there were without having to bother trying to figure out how many ND I was each time. (but maybe space doesn't allow it).

I am satisfied with the purchase I made because it exceeded my expectations. In fact, I ran some unpretentious tests on the fly, and the result I would say is not bad at all.. I
tried it with a focal length over 50mm, where I had no problems and the picture with a uniform exposure without a halo results, but it must be said that I also only tried it at ND400 without trying the intermediate stops so I couldn't tell what happens at a bottom stop; Unfortunately being in the middle of the day didn't allow me to do other tests.. (Of course I'll update if I can by adding more details).

Finally I don't think there is anything better in terms of quality/price, at least for the ones I've tried and K&F is improving year after year... I'm attaching a few photos to remind you of

the product and the draw attention to the result...

When I ordered this filter, I was very skeptical that it would do a good job. But after a week in the mountains, I can wholeheartedly say that this filter absolutely deserves FIVE stars for less than €20. The order went in no time, it was with me in less than three days. The first impression was really good. It can be screwed onto the lens very easily and quickly, regardless of whether there is another filter underneath. It also looks high quality and shows good workmanship. The different ND levels can be adjusted very easily. The only small problem is that there is no stop point and start point. However, this is a very small problem which hardly hinders you at all. I mainly used this filter on water bodies and waterfalls. He absolutely showed his best side. I've added a couple of pictures in which I used this filter in the attachment. I find that everything is sharp and clean. First of all the water, it has become very soft in my opinion and the filter has done exactly what was expected.

I'm not sure how long I've been running this, almost a year I think. They are fantastic for my video work. When I'm shooting business promos or mini-documentaries outdoors on a smaller budget, I almost always have one of these ND filters on.

It really cuts the low HDR on my most budget camera pack. I make a lot of videos for fly fishing guides and have an ND filter whose quality and variability makes me feel like I have a lot more control.

I typically use Canons 70D and up at the low end of my package deals.

As far as video quality goes, I can't tell the filter was on in the post other than that I have a shallow depth of field and my highlights aren't blown out

Do what it says on the tin. Well built. Easy to set. Has a certain polarizing effect. A must for sunny days. I really don't understand why a "layman" should spend more than 30 euros on ND filters. The quality of K&F is very good and the price is even more impressive, I recommend it!

I bought this variable ND filter to use on Nikon D300s with 18-200mm lens. I tested the filter on a white wall across various settings: f-stops, shutter speeds, ISO and ND settings. Works reasonably well at all settings except extreme ND where I saw uneven areas of brightness in exposure, but I had to push ISO past 3200 to even get the exposure. At 3200 ISO it could also be the camera. Overall I am very satisfied and would recommend this variable ND filter to most amateur photographers. The price is right for amateur photographers.

I have used numerous filters from Cokin, buying several for different size lenses. And I do a serious amount of light and strobe painting (do a YouTube search if you're curious). So when I dropped my super expensive ND filter I was devastated! Until I found this K&F Concept ND that offers a "Variable Neutral Density". Imagine buying an ND filter for the typical four hundred dollars (and that's only for a single fixed ND number)? Oooor, grab this well constructed, high quality ND filter that you can tune to your liking ON THE FLY! I still think...
Buy it Bonehead!

I love K&F ND filters. I don't know if I will ever buy another brand of filter again. This is the third K&F ND filter I have purchased and I have been very happy with all of them.

I've bought filters ranging from extremely cheap to extremely expensive, and these are honestly my favorite filters I've ever used. They are high quality, easy to screw on and off and very easy to adjust.