I was undecided whether to choose this product or another from a more famous brand. After trying it, I am very satisfied with the optical and construction quality.

Amazing filter for night street photography in nicely lit situations. Street signs, lights, etc. Add a very nice soft glow to your images. During the day, it's add a soft cinematic touch.

Not on my lens 100% of the time but a very nice filter to have in your bag.

I have watched different films noticing the use of diffusers. I really did a lot of comparing black matt filters.
This one is perfect. I get the softening without it being noticeable.
This is really a high quality filter. I am very happy with it.

Great product, you can use it as ND filter as well. Anyway, everything looks much better when I use it while filming, I would love to apply here some youtube videos but damn amazon blocks all the reviews that have links to youtube.

Very subtle through the viewfinder, but there is a noticeable affect on exposure time. For achieving a vintage portrait look, this thing is fantastic, especially when coupled with a manual focus legacy lens - I have mine on a Rikenon 50mm. Sharpness is greatly reduces, but not in a "cheap lens" way, just a subtle and even softening. This brings to mind the famous Pentax "soft focus" portrait lenses of the 70s, but is a far less blurred image. Handy to have in the kit bag, but not really good for much other than portraiture. I have yet to try a K&F product that I am not absolutely impressed by.

I really wasn't sure of what to expect from this filter. I mean, I know what it should have done technically but I have been fooled before with poor quality results and not knowing this brand I was prepared to be let down but I certainly have not been. This filter provides a beautifully softening effect that does not so much outright blur but rather seems to maintain a decent focus while creating a very soft hint of haze. It is very delicate and is a really nice tool to have in a portrait photographer's arsenal. It also has a nice effect on candle and sharp points of lights, creating a softened hue or aura around the light source. It looks a little "dreamy", if that helps to paint the picture.

I used this filter with my primary Nikon portrait lens and I intend to continue shooting with it to learn more about it but to this point, it has been a rather exciting discovery.

I will say that, although secure enough, I do find that this filter does not fit my lense threads as precisely as I am more accustom to. Something seems off but they are not binding, so I will leave well enough alone.

I am very impressed with this filter and think it fairly priced.

Definitely recommended.

As most K&F products, the build quality of this filter is quite nice. The threads are smooth, filter ring is powder coated and then optics... well, hard to say they're clear or anything since they're a diffusion/soft filter, but the picture quality is still quite good. More on that later.

The filter comes in a circular filter case that is one of the neatest filter cases I've seen! If they don't sell those as products yet, they honestly could! There are raised partial circles that allow you to place all sized filters in the case, unlike most with a foam cutout (which, admittedly offers more padding). It would be nice for the filter case to have a small sticker on it to indicate what is basically on the box--"NANO series 52mm MRC Black Diffusion 1/4" in my case. In fact the outer box has that listed a few different times, including twice on the sticker label... one on the case would be even better.

The optics look like a clear glass with a bunch of small grey dirt specks. That is the intended design. The effect it creates is a soft diffuse glow; a bloom effect. The contrast is lowered when using this black diffusion filter and overall it looks like a similar effect to a soft filter. The sharpness at the point of focus isn't too affected though, so it can still be used in portraiture as well as in other creative photography. Light sources will bloom when looking through this filter. I find the 1/4 strength to still be quite useful while the 1/2 an 1 may be more niche.

I got this to use with my Fuji xf 35mmf1.4 (55mm thread) I love the vintage look I can achieve with it. Think smoky barroom, portraits behind a candle, any photo where you might want a little extra glow from the lights. I have a much more expensive 72mm pro mist filter, but this one gives me just the look I want when combined with the magic of the xf 35 1.4. Recommended

Nice filter. Definitely comes handy in certain situations. Great for sharp lenses especially with no character. This adds some mood to it. It’s nice to have, looks well made and o love that I can apply to a lens and still be able to use the lens cover over the filter when not in use. I use it on my Sony 18-105 f/4 and the sigma 18-35 f/1.8 and am quite happy with the result. In my images the last image is the one without the filter, hopefully you can get an idea what it does.

I bought this 72MM filter supplied with the Sigma 18-35 and it is now indispensable for my video productions. It gives an analog effect that makes the images softer, the action around the lights is perfect and not annoying, moreover the production quality is high. It has a double thread to be able to overlap multiple filters and is equipped with a rigid case, for safe transport, with an anti-slip triangle inside (therefore usable with different filter sizes). At the current price it is a must.