After reading and watching mixed reviews online about this product, I decided to give it a go and I'm very pleased with it! I bought it to aid me with my automotive photography and decided to save money and buy it so it fits on my largest lens and then used step-up rings to fit it on the rest of my lenses. Just make sure you don't use it with lenses wider than 20mm as then you will start to experience problems with a dark haze around your images which can be easily edited out using a gradient mask in Adobe Lightroom. Apart from that I very much recommend this 2 in 1 filter and for the price its a no brainer!

Good value for money and produces good results.

Great having a variable and ND filter all in one. No colour cast visible. Recommend.

Good product

only tried it a few times but very impressed so far

I have always been a fan of K&F after buying their tripod, so I was pretty sure about the quality of ND.This is 1of 3 NDs I have purchased for my crew, and I should say this is amazing.I would start with the build quality, and it's pretty sturdy, the casing is aluminum and lightweight.Coming to the colors, I didn't see any difference in colors with ND on at Min and ND off. Also, the cutting down of light from ND 2 to ND 32 is so accurate for an ND(measured with exposure meter).

I bought this based on the side notes statement of 'no X even at wide angle' and thinking it would be easier to carry around than a bunch of ND filters and a polariser. Unfortunately it did not perform as described (see attached images). However, the reason for giving this 3 stars was down to the after sales service from Amazon and K&F communication. I returned the filter on a Thursday, received recept confirmation on the Saturday and my refund to my account on the Monday. I was then contacted by K&F asking why I returned the filter. This resulted in 3 or 4 emails between us with me explaining the issue and the potential of missleading description. K&F finally acknowledged the fault and declared they were removing the filter and looking into a solution.Why this was not tested before sale beats me but it was good to communicate with a manufacturer who appeared concerned about their products.

This is one of those essential pieces of kit for us filmmakers and I always tell people, 'buy cheap, buy twice' so plumped to spend a little more on this. Whilst overall, I am pretty happy with it, it still isn't ideal and I can tell that I am going to have to spend even more money to get the right results. I found that I still get the dread 'X' pattern, even though it has hard stops and I think there is a bit of a blue hue to the footage.However, it's far from the worst that I have tried, even in this price range and wil certainly do amateur filmmakers on a budget well...

I was given this filter by K&F concept to review, but this is my honest review based on using it for a few shoots of both photography and videography. The filter comes in a really nice plastic protective case, also included is a cleaning cloth in a pouch. The cardboard box itself is sturdy with a magnetic opening.I asked for the 77mm filter to fit my biggest lens and got some step up rings so I can use this on all my lenses and by stepping up you wont get vignetting. The filter itself feels very good quality and well built, the exposure adjustment ring allows you to choose between five stops, it feels like a fluid video head and will not move on its own.I didn't witness any colour shift, or any photo or video issues using this filter, also there was no sign of the black X some filters show when the two optics cross at their maximum point.I would definitely recommend this variable ND filter, its at a very good price point and by using step up ring for around £10 you can have this one filter work on all your lenses, that is a lot cheaper than a few sets of ND filters when your lenses have different sized filter threads.Using this on video at either 25 or 30 fps using shutter speeds of 50/1 or 60/1 this filter easily cut down the light to stop my footage being over exposed.I have added a review on YouTube and video demo, you can find this by searching youtube for this product description.