K&F is really making some fantastic filters as of late. The build quality on these are excellent. Precision machined brass rings that are thin enough not to interfere with the image but strong enough to protect your glass. They screw on very smoothly and the brass will prevent stripping and cross threading. The optical quality of the glass is excellent. There is no distortion whatsoever and the mist filter gives your images a very subtle dreamy quality. Something really impossible to do in Photoshop or with digital editing in my opinion. You get the realism and quality of an actual optical effect, and these look absolutely beautiful. Some people may disagree but I always prefer doing as much as you can in camera to eliminate the need for post processing. And of course for video it’s definitely a timesaver. Applying this subtle mist effect digitally in video is very processor intensive. This is a nice little way to soften the features for portraits and I decided to take a portrait of this little fellow. You can really see the difference around the eyes that the filter makes in addition to the fact that it was really bright and this filter helped soften the shadows. This is a 1/4 Mist so the effect is very subtle. Don’t be confused by the name black diffusion. This filter will lighten your images by reducing contrast and softening highlights. It actually lightens up the image a bit but in a way that doesn’t create blurriness. That’s the beauty of genuine optical filters rather than digital post processing effects. This is comparable to my German filters that I paid a lot more money for in the past.

first test of the black diffusion 1/2 filter

I have used 1/4 and 1/8 filters but I have never seen the 1 before. If you are familiar with the look that a mist filter provides then imagine that look greatly amplified. This filter creates a dreamy like look and gives a creamy smooth appearance to the skin. It blurs background lights a good bit. It’s like adding a lot of haze to the environment you are shooting in without sacrificing all of the detail and depth.

This effect can be too much for certain situations and taste and should be used with intention. This will definitely enhance your creativity in your work.

Just about every lense accessory I've purchased in the last year or two has been from K&F.
Black Diffusion 1/8 - 1/4 - 1
Mist
Variable ND's
UV Filter
CPL Filters
GoPro ND's
DJI ND's
20+ Cleaning Kits

All have been top notch, Now i wouldn't know what the difference between this, and a filter thats like 10 times the ask, but these all work perfectly for me.

This lense I would describe as a very Hollywood Noire like look, Its a very heavy look. @ 1 vs the quarter and eighth
I like the texture on the filter, makes it so you dont have to fight to get the filter off

Overall everything i've bought from K&F has been perfect, and done exactly what it says for me at my experience level

This is great value in my humble, beginner opinion! Introduces a nice bloom effect with a decent light source. Build quality is of high standard and the glass is quality as well! I would say this is a bit more than 10%, but does the job very well either way. Shots taken on my new Fuji X100vi

Nice I really recommend

Very good quality and results

Absolutely love using it with my Sony lens. It gives soft and beautiful picture, good quality, fits perfectly, good value

The strongest diffusion filter I own. This filter makes images absolutely glow pair this with some super sharp glass and you have a recipe for images that look like scenes to a film.
The filter is well made and boasts a heavy diffusion coating.
This is perfect for portraits or video projects.

I recently started using this mist filter with my Canon RF 24-70mm lens for video work, and I’m loving the effect it gives. If you’re looking to add that cinematic, dreamy feel to your footage, this filter is a must-have.

Cinematic Look: The biggest thing I’ve noticed is how it creates a subtle glow around highlights, giving my footage that soft, filmic vibe. It smooths out harsh lighting and makes everything look a little more polished and dreamy —perfect for a night time environment with lights.

Perfect for Lighting: If you're working with natural or low light, this filter helps create a gentle diffusion effect without washing out the image. It makes lights look more natural, especially street lights or practical lights in the background, giving them a soft, glowy effect that looks stunning on camera.

Build Quality: The filter is solid, feels durable, and fits snugly on my Canon RF lens with no issues. No noticeable vignetting, and I haven’t had any problems with color shifts. It's easy to screw on and off, and the glass quality is top-notch.

Easy to Use: It’s super simple to use for video—you just pop it on and start shooting. I’ve used it in both daylight and night scenes, and it always enhances the image without requiring major changes to my settings or lighting setup. Just a perfect addition if you want to add that extra flair to your footage.

Overall: If you’re into video production and want to up your game with a little more atmosphere and softness, this mist filter is definitely worth it. It adds that cinematic touch that makes your shots look more professional and polished, especially for portrait shots or any scene where you want that dreamy, moody aesthetic.