K&F Concept is really stepping up their filter game and this one is awesome. This review is for the K&F concept 82 mm black diffusion 1/4 effect with variable ND2-ND32 2-in-1 filter. For this filter, K&F stepped up its packaging, utilizing a magnetic lid box and a magnetic leather pouch. The filter itself is stored in a clear plastic bag, which unfortunately uses an adhesive folding closure (just be careful when removing/inserting the lens to not let the band of adhesive touch the filter). Still, the overall package is much nicer than the plastic snap box with foam cutout, but I can't say if it's more practical or "better" as I feel it provides less protection than the hard plastic snap box. Anyways, on to the filter itself.

The filter looks and feels great. It has a solid metal construction with a premium feel to it. The inner stationary ring has two large areas of knurling and the outer movable ring is fully knurled. One section of the outer ring has an orange metal tab sticking out for easy turning. This particular filter has hard stops built into it for the minimum and the maximum. I am unable to appreciate much or any X effect on my 18-35 mm lens (not that the X effect is typically a significant issue at these lower stop levels from 1-5 anyways). I really like the built-in hard stops though because it lets me know when I'm at the minimum and the maximum and I can make more efficient adjustments instead of just blindly rotating well past each end and going all the way around. The variable ND portion works well, but how's the black diffusion? I'll be honest, it's my first time using a black diffusion filter, but the effects were definitely noticeable between having it vs not having it. It provides that soft cinematic feel and tones down the highlights and contrast. I can't believe I've never used one until now.

The K&F Concept 82 mm black diffusion 1/4 effect with variable ND2-ND32 2-in-1 filter provides premium functionality at a budget price point, especially when compared to the bigger brands. At that point, you're paying extra hundreds of dollars for minor gains in optical performance. If you need the absolute best because it's your profession, then just move on and pay the big dollars. But if you're looking to test the waters or need a strong working filter without breaking the bank, then K&F has the glass you need.

Excellent investment in filters, I am ordering again these 1/8 and 1/4 black diffusion filters but without the ND because in low light it takes away a little exposure, this filter is designed for outdoors without losing 1/4 of black diffusion, or indoors with a very controlled environment.

It arrived in perfect condition, it is already the third filter I am buying, I am very satisfied with the quality they offer.

For starters, the filter came packaged better than I expected. It arrived in a nice faux leather case for safe keeping or traveling when not in use. It is also very well made and dare I say rivals some of the more expensive ones that I have in terms of quality and performance. It was a bit difficult to get onto my lens, I had to carefully line up the thread but once it was on my Fujinon lens, it did not budge. It was easy to adjust while shooting and wasn’t too loose that it moved on its own.

I’ve never used a diffusion filter before so I wanted to try something new when it came to my images and I’m kind of sold with this one. It added this softening effect to my images, smoothed out some of the edges but still kept the details.

I have a ProMist 1/4 and 1/8 diffusion filter, but I was intrigued by this combination ND and diffusion filter and wanted to give it a try. As a point of reference, a ProMist 1/4 will set you back $150 and a similar variable ND another $150, so your getting a great deal for $109 for both. But it's only a great deal if the quality is similar, and I'm happy to report that it is. I shot test footage using the ProMist and this K&F filters under the same lighting conditions with the same camera settings and then watched them back on a 4k monitor, and I couldn't see any discerbible difference in image quality. In using the variable ND, there was no telltale X pattern common to less expensive filters, and I really like the fact that the f-stops are marked on the edge of the filter ring (but they don't "click" into place like you'll find on more expensive filteres). SInce I'm frequently using a diffusion filter and a variable ND filter at the same time, to have them combined in a single filter is very convenient. I now have six K&F Filters, and I'm consistently happy with their quality. The price to value ratio for this combo filter is excellent.

Nice filter. Definitely useful in certain situations. Great for sharp lenses, especially those lacking character. That brings some mood. It's nice to have, looks good and I love that I can put it on a lens and still use the lens cover over the filter when not in use.

This polarizing filter and neutral density filter pleasantly surprised me, it is not overpriced and the quality of the photos is not bad at all, I have taken several photos with the different degrees that it allows to subtract light and the result is good, if you like silk effects in the water this is an essential filter.
It also has the polarizer that eliminates reflections on crystalline surfaces.

The filter arrived neatly packaged. The feel is good so far, it feels valuable. I didn't notice color shifts negatively.

The filter comes in a plastic carrying casing with high quality foam to protect it. The filter is a tight fit in the case so you can be sure once stored it wont move around or get damaged during transit.

The filter itself feels to be of good built quality with metal frame holding the glass in place. I like the lever to adjust the stops, the action is smooth and will not move on its own. I would have preferred if K&F included a lens cap just in case, I wanted to leave the filter on the camera.

Considering the price, the image quality is comparable to high end products. I found the image quality to be excellent as I did not notice any chromatic aberration, loss of definition or the dreaded X from graduated filter.
You can see some product and some test images I did at home to test the product. I hope you found this useful, if so, please vote positive below

This K&F Black Diffusion Filter is an excellent kit. It reduces the contrast, makes the blacks a bit grayer and provides a soft bloom around the highlights. Four filter strengths are available; from weakest to strongest they are 1/8, 1/4, 1/2 and 1.