It is an excellent filter for the price and the quality it provides. In my case one 1/8 of 49mm. The effect it produces is really nice and I can say that even in the definition there is a better minimal but very interesting one. Recommendable.

I have tried, and own, different grades of black diffusion filter. I think for its subtle effect, this 1/8 filter is my favorite. The smooth look, and highlight diffusion that you get with these filters, is either an acquired taste, or a specific characteristic that you're looking for in your shots. I personally don't use them all the time, but it is nice to bloom the highlights in certain scenarios. The 1/8 filter is very subtle in the daylight, but I found excels at night. You can of course, use it with decent effect during the usual golden hours, as the intensity of the highlights then, may be more visibly changed by this filter, photographically. In the daytime, with the sun right above you, it's hard to notice much of a difference. For video, it does an interesting effect, and may be something that you can apply to specific scenes, or just to unsharpened some of the digitized look from most cameras. Quality of the filter is very nice, made of good materials, and with nice coatings. It comes well packaged, in your standard plastic case, as well as included sealed microfibre cloths. It is affordably priced, and performs very nicely, for that price range. It doesn't in any way appear cheap to me, and like mentioned before, I do like the subtlety of this gradient. It's certainly good for the camera bag, and would be interesting to try with some golden hour portraiture. For video, I'd say it's limited to dreamlike sequences, and better suited for golden hour, and night time. All in all, I'm very pleased, and if you're looking for a 1/8 black diffusion filter, this one is a good choice.

If you're looking for a filter to create stunning cinematic effects in your photography or videography, then the K&F Concept 77mm Black Diffusion 1/8 Filter is definitely worth considering. This filter is incredibly easy to use and can help you achieve a dreamy, soft, and misty look that will make your work stand out.

One of the standout features of this filter is its build quality. The filter is made from high-quality materials that are designed to last, so you can be sure that you're getting a product that will stand the test of time. Additionally, the filter is very easy to install and remove, which means you can quickly switch between different looks and styles as needed.

Another great thing about this filter is that it doesn't have any negative impact on image quality. The filter is specifically designed to reduce the sharpness of your images slightly, which helps to create the dreamy, cinematic effect that it's known for. However, this reduction in sharpness is subtle enough that it won't impact the overall quality of your photos or videos.

The K&F Concept 77mm Black Diffusion 1/8 Filter is an excellent choice for anyone who wants to take their photography or videography to the next level. It's easy to use, built to last, and produces stunning results that will leave your audience in awe. So if you're looking for a filter that will help you create truly amazing work, then this is definitely one to consider.

This is a fantastic addition to any photographer or videographer's toolkit. The filter adds a beautiful dreamy and cinematic effect to videos and portrait photography, creating a unique and professional look that is sure to impress.

The filter is made of high-quality materials and fits perfectly onto a 77mm lens, providing a great range of compatibility with a variety of cameras and lenses. One of the best things about this filter is how easy it is to use. Simply screw it onto the front of your lens and you're ready to go. The filter is also very durable and easy to clean, making it a great option for anyone who wants a high-quality filter that will last for years.

An excellent filter from a company I trust. K&F make superb filters and I own several of them. They're a step up from other filter manufacturers and it shows in their attention to detail.

This ⅛ black diffusion filter adds just a touch of skin-smoothing-softness to your images which is very flattering to women's skin and unnoticeable to most people; it just looks natural. Highlights only have a very slight halo around them and the contrast of your image will be only slightly reduced; the blacks won't be quite as black.

This all adds up to be a great filter when you are shooting portraits. And if you want more diffusion you can order stronger variations of black diffusion. See their Amazon description for a comparison of the different strengths of black diffusion.

This is a bit of a niche filter, but I like the effect it provides and it fits my lenses. There doesn't appear to be any negative effects of color casting. I'm glad I have it as an option.

K&F Concept Nano-K series Black-Mist 1/4 filter 67mm

The filter makes a good impression of quality. The effect is gentle and it gives the images a creative look. I tested the filter with the Tamron 28 -75 2.8 G2 and am satisfied with the results. The model's face is slightly blurred and saves time in post-processing.

Price - performance and image results are good.

Lenses of modern digital cameras are increasingly being trimmed for sharpness and imaging performance, which is of course good on the one hand, but in turn also brings with it a dilemma, namely that subjects often appear harsh and contrasting and images, somehow lack a certain charm.
To defuse this modern “look” a bit, to make motifs a bit softer, highlights diffuse and a bit softer, that's what effect filters like the Nano-K Black Diffusion from K&F Concept are for and are particularly popular with cinegraphs.
But photographers also benefit from such filters, as portraits, for example, get a pleasant, somewhat dreamy look without losing too much sharpness.
The diffusion effect is best when a light source, such as a window or lamp, is in the field of view.

In the beginning, you will have to experiment a bit to find the optimal filter strength for the desired look.
In my opinion, the K&F Nano-K Black Diffusion ¼, which I tried out, is ideal for gaining initial experience, as the filter strength of ¼ already makes the diffusion effect very effective, but still maintains sufficient sharpness and contrast.

Both haptically and qualitatively, there is nothing wrong with the K&F Black Diffusion. The filter is very well made and has a flat profile to avoid vignetting. The thread is cleanly worked and runs smoothly.
I couldn't notice any noticeable color shifts or vignetting.

Tip: I always buy filters according to the largest lens diameter in my inventory and adjust the filter, using step-up rings, to the lenses on which I want to use the filter right now.
This has the advantage that you only need to buy filters once and even though large filters are of course a bit more expensive, like small ones, it's worth the bottom line, as step-up rings don't cost much. It may also be worthwhile to buy a complete set of such adapter rings, with different diameters.

You can’t go wrong with this filter if you need that filmic soft look I love it

his K&F Concept filter screwed on smoothly to my lens, without any of the harsh turning sounds other filters made that I have tried. This filter is rather unique in my collection.

I own a lot of UV filters, but this is a diffusion filter. It produces a noticeable glow around light sources. It is a 1/4 strength filter and did produce more of a glow than another brand's 1/8 filter that I tried.

The filter itself feels thick and substantial.

You can really see the diffusion coating on the glass.

Overall, I am happy with this filter and it did what it is supposed to do. It produces a glow that is a bit