I've mainly shot landscapes, architecture and still-life images but in the past year have begun doing more people and night shooting. This lens, at 1/2 mist creates a very mild glow and softness to images without sacrificing detail. I've added a touch of glow to some people and macro flower images in post processing, but using a filter to get the effect in-camera produces a much more subtle and natural look.

The filter itself is extremely well made, attaches to my lens smoothly and easily and is just as easily removed. Optically, it's spot on and produces no distortion or unwanted artifacts.

K&F filters are every bit as good as the significantly more expensive German filters I've purchased and this is now my go-to brand.

Well made filter. I got the 1/4 filter in 72mm size. Great for portraits....gives a softer edge and a slight glow on the highlights.

This is subjective, but I wouldn't go any stronger on the filter strength, and in fact, you might want to consider the 1/8 strength filter. Too strong a filter like this makes your photos were taken at an '80s Glamor Shot booth at the mall...

This is a diffusion filter for cameras. I have the variant for 58mm filter threads here. The Black Mist 1/4 filter creates a more softening effect. It looks really nice, but you really have to look closely to see something. However, you can see it in direct comparison. In any case, it is not “too much.”
The filter is well made and fits any lens and camera with an appropriate filter diameter. (I've tested it on 3 different cameras)

You can get the same effects using your computer programs but I like to do things “old school” by using different filters to achieve the desired effect. This filter works well.

K&F Concept 77mm Black Diffusion 1/8 Filter, Mist Dreamy Cinematic Effec Filter for Video/Vlog/Portrait Photography K-Series

This is a 1/8 stop black diffusion filter that lowers contrast and makes highlights glow. It’s not quite a soft focus filter, it does give the overall image a softer, dreamier and glowey effect. K&F filters are very well made and very well engineered. I have been using several of their filters recently and I rate them among some of the best in the business. These black diffusion effects are pleasing and subtle at least with the 1/4 and 1/8 stop filters. The effect gets more extreme with the 1/2 and 1 stop models. These are great for wedding, glamor and portraits, or anything you want to have a soft diffused glow to the image. Equally effective for video and photos. A fun effect to play with for added drama and vibe. Works best with scenes with lots of background highlights, or very backlit scenes. Modern lenses and sensors are so sharp that sometimes you just want a softer vibe, this is a good tool in the tool box for an instant dreamy and dramatic quality.

Have had so much luck with all my K&F filters for my few lens great additions for the price.

This has become my favorite filter to use! I photograph a lot of athletes, and often put lights behind them, and with this filter, I'm able to make those lights bloom out, instead of being too sharp and harsh. Big fan!! Great quality and feel too - will be getting more of these in other filter sizes.

I mainly use this great filter for live concerts.
With the filter effect, you can capture wonderful lighting moods.

The workmanship of the filter is good and it feels very high-quality.
Unlike the premium models from K&F, this filter comes in a plastic box, which is not easy to open the first time.

I am satisfied with the performance of the filter and would buy it again.

The best way to create soft lighting without needing special equipment. Now it is noticable that on stronger lenses you will get skin softening too. So your images will be less sharp. I would recommend a soft or medium strenght at best. Unless thats what you want.

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.