K&F Concept 77mm ND8 to ND128 Variable Neutral Density Filter Slim Fader ND Filter 77mm 3-Stop to 7-Stop for Camera Lens NO X Spot,Nanotec,Ultra-Slim,Weather-Sealed


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  • 【Material】 77mm Neutral Density: Made by Completed Professional Optical Glasses instead of Optical Resin. filter reduces the intake of light without affecting the overall color balance.
  • 【No “X” cross on images】Say goodbye to the "X" cross on images, K&F utilize cutting edge technology you're going to say goodbye to this common issue with wide angle lenses and variable ND filters.
  • 【NANOTEC】Our optical engineers developed new Nano coating layer technology, Waterproof, scratch-resistant, anti-reflective green coating, effectively prevent from oil, fingerprint, scratch, protect valued lens.
  • 【Professional Design】Ultra slim rim design preventing wide angle vignetting. Extra tough aviation aluminum frame ensuring durability and jamming prevention.
  • 【NOTE】This Filter kit is compatible with all 77mm lenses. Please verify your camera's lens thread size(usually marked somewhere on the lens barrel or printed underneath the lens cap) before ordering. The number is always preceded by a "ø" (diameter) symbol.


K&F Concept

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kd c

ND-------Extend exposure time. Try an ND, or neutral density, filter. ND filters reduce the amount of light entering the lens. This makes it easier to achieve effects such as a shallower depth of field or blurred motion.

  • Neutral density can be adjusted from 2 to 5 stops, easy to create different neutral density by rotating the ring.
  • The front diameter is larger than the back diameter of this filter , which is specially designed to avoid vignetting at wide angle lens.
  • Allows the use of slow shutter speeds, with high speed films or digital cameras, to record movement/image blur in subjects.
  • Decrease the depth of field by using wider apertures, which helps separate subjects from their background.

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No "X" cross on images

K&F utilize cutting edge technology you're going to say goodbye to this common issue with wide angle lenses and variable ND filters.

Nano Coating

In addition to state-of-the-art MRC, our optical engineers developed new nano coating layer technology, called nanotec, from the ground up to repel dirt, water and other elements by beading rather than absorbing and smearing. Set in our workhorse and built to withstand extreme wind, salt water, dust and other abrasive conditions and elements.

Scratch Resistant

The ND filters are made with premium Japan Optics glass, which could resist scratch,protecting your camera lens well.

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Product information Size:77m Package Dimensions 4.69 x 4.69 x 1.06 inches Item Weight 5.8 ounces ASIN B07QMV8S43

The darker version of this is utterly indispensible for LOG video with high ISOs forced by the camera, combined with fast lenses you'd like to open up for depth control/"bokeh". And only the wildly expensive PolarPro has a similar option. And while I suppose the PolarPro might be somehow better - I'm simply not rich enough to find out! In the meantime the K&F has served very well. I use this primarily on a Fuji X-T3 with f1.2 and f1.4 prime lenses, shooting F-LOG at the required minimum 640 ISO. Secondarily on a Fuji X-H1 (800 ISO LOG!) and even a Nikon D750 for occasional stills.

** Hey K&F! Do you read reviews? I wish you offered the dark version in smaller diameters (e.g. 62mm) as I'd get another to use with the majority of my prime lenses with no step-up ring. **

Overall I am happy with this filter. I did a lot of research when looking for ND filters for my Fuji XT3. I had three goals when choosing an ND filter.

1) I can get good long exposures
2) There is no noticeable color shift
3) No vignetting or distortion on my 16mm & 56mm lens.

The three goals above have been met. Provided you are not taking pictures during the hours of 11am and 4pm on a sunny/bright day and expecting more than 4-second exposure then this is great. Outside of these times, you can take up to 8minute exposures. I am a little concerned that this is not actually an ND8 to ND128 filter (reasoning below).
I have not really noticed any major color shift. I would say if anything that it shifts ever so slightly to the cooler tones, but nothing that basic color correction cant handle.
I am not really getting vignetting for most of the time even on my 16mm F2.8. I have noticed once or twice on some pictures however. I am using a step-up ring from 49mm to 62mm.

I only have one complaint. The case is of poor quality and not fit for purpose. It is a cheap circular plastic case that is far too big for the 62mm filter. It's probably designed for the biggest lens they make. There is no padding of any kind so the filter moves freely inside the case. Not what I expected at this price point.

There is also no indication anywhere that this indeed an ND8-ND128 filter. Nothing on the packaging or the product itself. Even the picture on Amazon shows it as an ND2-32. So I am a little concerned this is actually the filter I ordered.

Hopefully someone from K&F will follow up on this?

The first thing that stands out is the nice packaging that it comes in. Definitely meant to keep the ND filter safe. I tried a few video clips and some photos with the filter attached to my Zeiss 24-70mm lens. The image quality was very good and the filter feels really substantial.

I'll post some images after uploading to my computer.

I bought this for mostly waterfall photography because my big name brand 5-10 stop ND was overkill for my needs. My exposures were 30 seconds to one minute, so I didn't push this filter to the extreme, but I see no artifacts or color cast (beyond the expected shift from long exposure to begin with). You are not wasting your money. Great investment!

So if you don't go beyond about half way as far as filtering, the filter does ok. Otherwise it introduces a sepia-like color cast to the image. And even though it's designed to work with the ultra-wide iPhone lens, it really doesn't at the higher stops as you do get vignetting.

You can spend a TON more on a "nicer" fader, or a set of multiple ND filters, but the quality from this is great, and since it's variable, you don't have to carry a bunch of filters around, just 1. This filter gets you 95% of the quality of higher end filters at 20% of the cost.

A bit pricey but not at all. Its bitter sweet when it comes to filters. Really good range to enter the ND world. This works great!
Have not encountered any issues with pucture nor distortion. Good glass and results for the price.

Excelente producto tal como lo dice no produce la cruz que en filtros mas baratos si aparece, los materiales se sienten de buena calidad, como inconveniente no lo pude poner en un sigma 17-50mm f 2.8 y poner el parasol incluido a la vez, ya q el borde del filtro es mas grueso y no pueden estar juntos