K&F Concept37mm ND Fader Variable Neutral Density Filter ND2 to ND400 for Camera Lens Ultra-Slim, Multi Coated

Very very good quality performs very well highly recomended

For the price, this is the best VND. Shifts color slightly but nothing that cannot be fixed in post. Only problem is that it works upto 8.5 stops. Still gives me a 2.8 aperture shutter 50 in UAE’s harsh midday sun. Unlike others who commented, my filter sits properly with the markings on the top on Sigma 24-70 f2.8.

Good filter for the price they ask. Using mostly for videos.

There is butterfly effect in wide angle usage, also it is affecting the far focus point at long lenses, the images are blurry especially if focus is on infinity. I tried with manual focus as well there is a lot of refraction at infinity focus. If use only wide angle lens, it provides good results only down point is butterfly effect.

Perfect for me.Does the job well.

I don't think there is anything at this price that is that good. I have to be honest, I have not used any other variable ND filter but this one is amazing, super clear and no fading of colours. Great product and will recommend it to others.

I’m not satisfied with the qualityIt creates a huge vignette and also X effect

So on the corners it have vegniet and its just destroyed the footage

This filter is nicely packaged, operates smoothly, and covers a wide range of stops so I was really disappointed when I discovered it did not play nice with my cameras. On both my Sony a7iii and a6600 the filter would produce a dark "X" in the image instead of evenly attenuating the light. I assume this is a polarization interaction. In any event, this is a very nice filter, it just didn't work on my equipment.

tiene una gama muy amplia pero en ciertos momentos crea sombras ya sea en el centro o viñetas muy fuerte, recomendaria mas uno sin una gama tan amplia pero que evite ese viñeteo

El uso de repente hace que se vea como telaraña la imagen

Quality is ok, but there's a minute hairline scratch on the edge. But not noticeable while firing a shot or even after, so I choose to go with it without a replacement. So be careful by thoroughly checking yours.

I purchased this for my Canon EOS 70D to take landscape photography and has been a Brillant addition to my kit. The glass is nice and clear and serves it's intended purpose, taking my photography to the next level.