I have a few black mist type diffusers, including the more expensive K&F Nano-X, and even more expensive Tiffen. I bought this Nano-K series version half expecting to return it but thought it worth testing out given the much lower cost. Construction-wise it is as solid and well made as the Nano-X using the same finely machined “aircraft grade” aluminum. Screw thread is precise and smooth. K&F give very little useful information about the the actual differences between their filter series, except that the Nano-K is meant to be “basic level” compared to the supposedly more professional Nano-X and Nano-X Pro series. If you read the manufacturer’s small print, they are all made from optical grade glass from Japan, have advanced multi-coating and resistant to moisture and mold. So what about the effects performance? Again, I was prepared for disappointment. All brands of this type of black diffusion filter have subtle differences, as is well covered by numerous YouTube videos. The Tiffen for example tends to give slightly less intense diffusion for a given rating (i.e., 1/4 vs. 1/8 etc.) than the Nano-X, but both are equally good a preserving the blacks and fine detail in the mids, which is why we like them. When compared to the Nano-X, I can see no visible difference whatsoever in the image produced by the Nano-K. This was tested on a Canon C100 Mk-2 with a variety of lenses and conditions. For this reason, my advice would be, given the choice between the Nano-X and Nano-K, without hesitation get the latter. A side note: the Nano-K series appears to have been originally marketed in Germany, evident from Google searches and the small print on the packaging, i.e., GmBH, as place of origin. My conspiracy theory is that these were initially targeted for a European demographic and price expectations. Anyway, the bottom line is that here in Canada/USA they are a phenomenal bargain and not to be missed while available.

I have the 1/4 filter as well and I feel the that is just slightly stronger than this. They are both subtle and soft, with this being ever so slight. this is no sledge hammer, but a delicate mist. A very soft diffusion on light sources and specular highlights. A softness to the skin. this is a much, much lighter effect than the old, high end French silk stocking over the lens. ever so slightly dreamy, a light glow without being overkill. I have not compared to pricier brands, but I am quite happy with this. I don't imagine that I will be bringing it out for much more than portraiture, I intend to experiment to see what it can bring to my other photography work.

Beautifully packaged and secure, with the added bonus of 3 microfiber cleaning cloths, this is quite the bargain if you are in the market for such a filter, but if you want to have a noticeable effect you might go 1/4 or stronger.

Filter is well made and feels solid in the hands. I like it has the textured grip on to the edges to make it easier to screw and unscrew. This quarter strength black diffusion filter provides just the right amount of diffusion to the highlights without being overbearing. I feel like any more, and it would be obvious that you have a filter on, but any less, it would go unnoticed. Useful bit to have in your kit.

It does create a unique look, and I don't think it is something that could be easily done in post-processing. It is thin and lightweight and easily fits in my filter pouch. With that said, I don't think that this will see much use for me. It's just not the kind of effect I will need often. I'm saying that as a photographer. If you are filming video, I think there are probably more valid use cases for this.

This is just what I needed. I've been building out my iPhone video rig setup and have been running into the issue that all newer iPhones have with over sharpening images and video. This filter is very very mild, but just strong enough to cut that sharpness. I have it mounted to the Moment universal filter mount adapter, with an ND filter also from K&F, and use a third party app to control the shutter speed and white balance which helps add a bit of motion blur and a more natural depth of field than the cinematic mode in the native camera app. This filter will pretty much live on my iPhone while filming. Works especially well with that ND filter, but on overcast days I just use this Black Diffusion filter and it works great.

Diffusion filters like this come in "black" and "white." The white ones I like to call "bottom up" diffusors. They increase the brightness of the shadows as they diffuse.

A black diffuser is a "top down" diffuser, taking the highlights down slightly while softening the image.

Fits my Canon L-series lenses perfectly, and as a diffusion effect, gives nice image quality at a good price. In fact, where some types of filters are worth paying the premium, a diffusion filter is a place to save a little cash when you can. Since the effect itself essentially degrades the image to get a creative effect, so long as the creative effect looks good, you're getting your money's worth.

Five stars.

As with any filter you put over your lens you are limited to all the images having the soft focus effect. As a digital photographer I have mostly moved to creating effects on my images in post production in Photoshop where you can selectively choose the type and extent of the effect to each image. Early in my career I was using special soft focus filters designed and created by the motion picture industry but I no longer have that set and I wanted to see if this filter would emulate that effect. It does a decent job but it falls short of that system that had multiple filters of varying degrees of soft focus but I knew that when I bought this filter. It's nice to have this filter when I know I will need it for certain subjects but for the most part I will be creating my own filter effects in Photoshop for most jobs. Good value for the money also.

Has the same look and feel of a traditional promist filter, and much like K&F Concept's other filters, it does a fantastic job of that without any noticeable color cast or tinting, and without breaking the bank.

Mirrorless cameras, this filter makes every shot you shoot have a soft they’re looking for the highlights and a good flare in greatest skin tones than normal. This digital video comes across to shop sometimes and this helps with that a lot will definitely make sure that you can see your film at cinematic and clean Chris way while warming up highlights, and Just making the film feel more cinematic more motion picture aside from shooting at 24-25th frames per for second, shooting anamorphic lens is, this is the best thing you can have in your arsenal fourth cinematic Crisp look for a short films.
Kenneth concept always delivers make some of the best filters in the business. Everything is extremely well made. It comes with a very nice wallet to hold your filters in. There is the highest quality, and I can can’t recommend him more than enough.

The black mist filter is a pretty subtle effect. This filter is my first black mist filter. Basically what it does is defocus and soften your images somewhat. I tried a 1/4 filter, but I think I'd prefer the 1/2 for more of the effect it gives. It's fairly easy to soften images a little in your image editor of choice. I think the 1/2 would provide a more natural looking softening than softening in editor software.
The filter itself is well built and the ring is nice and slim. The package came with three sealed microfiber cloths which is quite a handy addition. These filters are inexpensive enough to buy several intensities to try. I'm going to buy a 1/2 next!