I upgraded to this K&F VND2-2000 from my K&F VND2-400. This gives me more versatility when I need to get that light stopped down. Weather I'm shooting waterfalls and need long exposure or I'm shooting slow motion and need to stop the light down to keep my shutter consistent, the extra ND is perfect. I'm a fan of K&F their filters are very affordable and the image quality is still quite clear. The build quality and tolerances are quite nice.

My first foray into filters and I'm excited to use this beyond testing indoors and out in direct daylight. The filter comes in a plastic case, which I appreciate. The lens fits great on my Nikon and I love how it's a variable filter, so you're able to shift the lens to create a more dense filter effect along with a wide range of stops. Pretty happy overall and I'm pretty sure this will be a main driver during the summer.

This is my first experience using a Neutral Density filter, let alone a variable one, so I don't pretend to be an expert. I haven't had time to really play with this filter either; I just took a few quick shots to see what it does. However, I am impressed with this filter. It is clearly a very high quality filter. Even though this filter can be adjusted from ND2 (1 stop) to ND2000 (11 stops),l the frame is very thin and is made of high grade machined aluminum. The filter is adjusted by turning the outer ring; there are eleven marks to indicate the amount of adjustment, and the adjustment ring moves very smoothly with adequate resistance. The filter is made of multi-coated glass to reduce glare and other anomalies. On my 18-35mm lens, the lens hood will not fit with the filter installed, and neither will the lens cap. The three attached photos show how the filter can be used to reduce the amount of light. The three shots are from the minimum setting to the middle setting; all camera settings are the same except for the shutter speed. I tried some shots at higher filter settings, but the effect was too great (at least given my limited knowledge). While I still have a great deal to learn about using this filter effectively, clearly it has a great deal of potential. This is a precision device at a price that is much less than some other brands I have looked at.

I shoot a lot of video with different lenses, and lately have been using my 24 f1.4 Sony lens quite a bit while outdoors, and this can be a very bright lens, so using a variable ND filter like this one by K&F can definitely be useful and a big help to shoot with low apertures and further blur out my backgrounds nicely. I didn't notice any real color shifting, and my image has remained sharp as expected. I like that this one is so variable and allows me to use just this one filter, rather than having to keep changing them out to different ones and the light changes. It's just more useful. I'm thankful this one came with that little plastic storage case, rather than a pouch or something useless, because it helps me to protect the filter when not in use. This is a nice inexpensive alternative to much more expensive ND filters and it's actually quite nicely made.

Se le nota la calidad al producto y llegó rapidamente a latinoamerica.

The most important to me: the colour accuracy! By the way I did not check with vectorscope but I think this filter performs well! Especially in the middle range (3-7 stops). And this is what I need in strong sun: I don't use the lower end because that's not enough and I also don't need the strongest stops because that is too dark.
K&F Concept made well. I planning to buy from this filter in 72mm or 77mm size in the future.

I gave it try to this filter and I have to say: in this price range this is a very good value! Not perfect of course but decent.
This item performs best in the middle. The first 3-4 stops has a bit yellowish tint but above that is disappear.
From 8 stops slightly vignetting is coming with an average focal length. When you use wide angle or super wide lens, the vignetting (cross pattern) is coming strongly. But every vnd filter has the same problem with wide lenses!
With telephoto lens I did not see any degradation, image quality problems. Somebody say vnd filters in strong (high) stops has "double" effect and similar issues but not with this product.