Since I started doing long exposures , my variable ND filter of choice was Vivitar. It's worked great over the years but I was in need of a new filter.

Since I also own a K&F Concept tripod, and they've treated me well, I decided to give this filter a try. What could be cooler than an ND filter and a circular polarizer in one?! And I'm glad that I did!

This filter works incredibly well. With my old ND filter, I had to stack a separate circular polarizer on top which would lead to vignetting on my widest shots. With the K&F Concept 2-in-1 filter, that no longer appears to be a concern at 18mm. At 10mm, I've noticed a very slight vignetting which is almost unnoticeable. But, it's definitely a huge improvement over filter stacking.

While it may require 2 hands, this filter is very easy to adjust. It also feels well built and sturdy.

All in all, this filter was well worth the money invested.

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).

Great bang for the buck! Used it at Cannon beach on 11/5 and the results were outstanding.

At first I wasn’t too sure about the price, but that quickly changed when I started using them. I had tried the K&F in the next higher price bracket but found that I couldn’t justify them for my purely amateur photography.
If you want great quality at a decent price these are well worth looking at. If you’re of a more professional/business mind then you won’t need reviews done on Amazon by amateurs like myself.
All in all, I can highly recommend these filters - I’m fortunate that I only need three thread sizes for my Canon L-Series lenses, or it could become very expensive!

This is my first ND filter, so I can’t tell you if this is quality product or not compare to other brands. This ND filter did the job for outdoor recording, my footage came out amazing with proper camera setting and the right time to film. I never had several friends asked me if I’m happy with the result because they were amaze by it.

It easy to use...fits my Zeiss 16-35mm and my 24-70mm and gives me very nice results....allowing me to dial in the right amount of exposure for the effect i want

Defintely worth the purchase. I usenit for outdoor events as well as landscape photography. Quality and durability are magnificent!

Great filter for long exposures! Used with my 16mm 1.4 out at Pebble Beach and worked out the colors in Snapseed, overall a great value for the money!

Very easy to use and produces great quality images. Being able to adjust the exposure without removing and adding filters makes shooting so much quicker. Image quality is great.

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.