The K&F Concept 82mm True Color ND2-400 Slim Variable ND Filter is an exceptional tool for any serious photographer. This adjustable filter allows one to finely control exposure, ranging from ND2 to ND400, enabling stunning captures in bright conditions without compromising image quality. The slim design ensures minimal vignetting, making it ideal for wide-angle lenses.

Accompanied by a microfiber cleaning cloth, this filter maintains its clarity, ensuring that your photographs remain crisp and vibrant. The ability to adjust the density on the fly enhances versatility, making it perfect for landscapes, long exposures, or achieving that desired depth of field. For anyone seeking to elevate their photography, this neutral density filter is indeed a worthy investment!

The adjustable range from gives me so much flexibility, allowing me to easily control the light in different settings without having to switch filters. It’s slim, so it doesn’t add bulk to my camera, and it doesn’t cause any vignetting, even at wider angles. The true colour quality is impressive, with no colour shift, so my photos come out looking natural and vibrant. It’s also very smooth to adjust, making it easy to set the exact level of light reduction I need.

I recently started filming more video after years of just taking travel photos. For photos, I still prefer single stop ND filters because they provide the absolute least amount of color and exposure issues when compared to variable filters. However, for amateur run-and-gun travel video making the variable filters are so useful that the convenience outweighs the image degradation. I also picked up the Neewer "true color" variable ND filter, which I liked when not compared to another filter. However, after looking at these two filter options, I find the Neewer option to be brown or yellow compared to this K&F option. For what its worth, I think both options are useable and worth the cost. However, I can tell you that I like the image out of this filter much better. However, this filter doesn't have a hard stop at each end, so the filter just spins and spins and you have to decide where the filter is the strongest or weakest. The Neewer option has a stop and the strongest and weakest setting, making is easier to control. On that issue, I'd find these variable filters better is they had a small knob to help spin the filter. The knob not only making the filter easier to turn in the hurry without getting a finger print on the edge, the knob would also provide a visual cue as to where the filter was set. While this has room for improvement, I think this works perfectly for my needs, especially when you consider the relatively low cost of the filter. It isn't cheap, but it's good enough that you don't need to spend $100 in my opinion.

Great piece of kit! No issues with fit or usability. The filter is well made from quality materials and comes with two microfibres for cleaning. Essential for achieving those beautiful artistic landscapes!

I have several ND filters for my gear. I buy them at the size of my largest lens and get step-up rings to make them fit my smaller diameter lenses so they're all interchangable.
This ND filter has a 9-stop range, which is amazing. I'll use an ND filter for video when outdoors to reduce the brightness and for photography for allowing longer exposures.
I didn't see any X on the lens (which happens with poorly made variable filters) and the color appears neutral.
So overall, they're great.

My complaint is two-fold:
1. There's no guard to stop the filter from being moved beyond it's desired range: When adjusting a variable filter, I'm looking at the screen for exposure, not the filter. Because the filter spins 360 degrees, it's easy to push it lower or higher than the useful range. A number of filters I've used have stops to prevent this.
2. There's no "nub" to move the filter: This is usually what helps with #1: a small metal pin that I can push with my fingers to adjust the filter. Without this nub, I've got to grab the filter like I'm taking it off to adjust it, increasing the chances that I get my fingerprints on it or accidentally do spin it off.

This ND filter is a fantastic tool for photographers of all levels. Crafted from high-quality optical glass, it delivers superb image quality and fits a wide range of lenses – it's currently attached to the kit lens that came with a Canon EOS 200D. Easy to use, the filter features a smooth rotating dial for precise light control.

Ideal for landscape, portrait, and street photography, this filter excels in bright conditions, allowing you to reduce light without compromising image quality.

It comes with a sturdy storage case and three microfibre cloths to keep it clean and protected. The case also helps to prevent fingerprints and smudges.

This variable ND filter is a valuable addition to any photographer's kit. Its high-quality construction, user-friendly design, and superb image quality make it a must-have for those looking to elevate their photography.

First off, I would like to say that I have purchased several filters and devices from K&F in the past and have always been happy with their products. This variable ND filter was another well-made filter with which I was pleased. With some other brands, I have had trouble with adjusting the filter to make changes to the density of light that was allowed through. This one I found to adjust very easy, but not so much that you might bump it out of position. This 52mm filter is for use on my Canon cameras and has once again expanded the options I have available. This shows that a quality filter can be purchased for a reasonable price.

Very good optical quality, slim fit variable ND filter. A variety of filter sizes are available. The filter is high quality optical flat and multi-coated. Very good value for money.

This is high quality ND filter. 72mm thread works perfectly on my RX10. Filter rotates smoothly and is very even. One thing I noticed is that this doesn’t have a stop and rotates freely 360 degrees in either direction. It does have dots and markers to indicate positions for ND strength. And due to the rotating design, the outer frame is slightly wider so I can’t keep these on the camera and mount hood in reverse position. It’s a minor inconvenience but I wish I could have install the lens hood in place. Optical quality is great and it’s an essential piece for slowing down the shutter on a bright day. Recommended.

K&F has risen to the top when it comes to choosing filters for my cameras. They produce products at various price points while delivering excellent value and performance. This filter is no exception. Minimal color shift with no other visible artifacts (X). Smooth rotation through the stop range (no clicks). Given the cost of this filter, this is an excellent value.