I did a lot of research and watching videos etc before buying the K&F veriable ND filter, I wasn't sure this filter would help with 4k video, wow was I so wrong. As you can see in the screen shots from the video, it makes a massive difference. I am very impressed and glad I bought it. Yes I would recommend. Thanks

Perfect, the adjustment is very progressive and practical, no chromatic aberration, the sharpness is preserved. In short, nothing to say, it is an essential and very versatile tool that is accessible to everyone. I recommend.

I use the filter both for filming with the DSLR, as well as long-term exposure during the day with the aperture open, especially when filming it is simply beautiful with the open aperture. The ring can be turned easily. The sound should be recorded externally, because the ring clicks quietly in the intended positions. The packaging is great for transport and can withstand the attacks of my 1 year old daughter. The picture quality looks great. In any case, I couldn't see any color casts or other disturbances. I'm very satisfied with the ND filter.

As a photographer I'm always looking for ways to save weight, then save money. Being a longtime Lee Filters user I was skeptical about changing to a product half the price and always heard bad things about circular variable ND's. Man I was shocked by how good this product is. Really happy and will be buying more.

The filter does not modify the colors and there are no rare vignettes (the famous X). It has a stop at minimum and maximum and marks to fix the intensity, even at maximum does not produce vignetting. The filter is not very big but it is better to put the lens hood first on the lens.

ND Filters are an essential for some types of photography such as moving water effects - and which I suspect I'm overdoing a bit .... And of course there are millions to buy and a huge range of costs. I've tried loads from the super cheap Chinese resin to some decent quality ones and now this.First off it's optical glass. And that makes a difference because the resin type whilst not bad if you treat then with utter care tend to scratch easily and of course the optical quality no matter what the blurb says is not nearly as good as decent glass.Secondly it's really well made. I mean up there with the stupid priced stuff well made which I've tried and used in a well known camera warehouse. This is a genuine 100% top class bit of kit in terms of the standard of manufacture and the general feel of it. Smooth in action with a perfect optical clarity across the range of density. In use it is super easy. Fit - which is smooth given the well made thread and then rotate the outer ring to the desired level of darkness. It saves a load of faffing with different filters or stacking them. Honestly, if you want a good range of ND filter (not graduated of course) then this is a great choice. I used it on my Zeis Batis lens and it worked a treat.

I was skeptical about this product with the price but this is a great ND. I haven't done any 'proper' testing but from the footage I've shot with it, it's 10/10. No noticeable color cast or any vignette. I would recommend!

Good product, good seller, and fast shippment. I would recommend this product to every one that wants a good ND filter for the money

Absolutely love this 77mm nd filter it fits perfectly on my nikon 70-200 f2.8. I use stpe up rings for other lenses like my 85mm f1.4. The ease of use is phenomenal and it slides so effortlessly. I love this nd filter I'll recommend it to anyone mslide to the darkest and put your aperture wide open and shoot a long exposure at day time for amazing results. Enjoy!

I used it on my 17-55 canon 2.8 lens for video. Its amazing! Nice feeling to rotate it, perfect case for transporting included in the box. Does not have 'x' when used at 8 stops! Doesn't effect image quality. I have a similar just more expensive different brand variable nd and performs not as good as this one. Im a pro cinematografer and i trust this brand!