K&F Concept BLACK-MIST 1/4 Filter
The digital cameras are getting better and better, which often makes the image look "too sharp". What the filter does is to make the image look less digital. Skin tones are softened over the entire area and thus also highlights caused by sweat or decreasing powder on the skin. Reduces contrast. A rather non-specific filter that still has its use cases and has been an integral part of the arsenal of cinematic filter sets for many decades.
So if you want to see more subtle light courses around your lights and also want to weaken the rather strong reduction of contrast in classic diffusion filters, the Black-Mist 1/4 filters with black additional particles is just right.