K&F Concept 77mm Black Diffusion 1/8 Filter, Mist Dreamy Cinematic Effec Filter for Video, Vlog and Portrait Photography K Series This is a 1/8 f-stop black diffusion filter that reduces contrast and makes the lights shine. It's not exactly a soft focus filter, it gives the overall image a softer, dreamier and glowing effect. K&F filters are very well made and very well developed. I've used several of their filters recently and rate them among the best in the business. These black diffusion effects are pleasant and subtle, at least with the 1/4 and 1/8 stop filters. With the 1/2 and 1 stop models, the effect is even more extreme. These are great for weddings, glam and portraits or anything that needs to add a soft, diffused glow to the image. Equally effective for videos and photos. A fun effect to play with for added drama and atmosphere. Works best with scenes with a lot of backlighting or scenes with strong backlighting. Modern lenses and sensors are so sharp that sometimes you just want a softer atmosphere. This is a good tool in the toolbox to get dreamy and dramatic quality instantly.