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K&F XV37 77mm Fader ND Filter Neutral Density Variable Filter ND2 to ND32

4.6 58 Review(s) SKU:KF01.1063
$71.99 $62.99
To United States Expedited Shipping 3-5 business days
  • Brand: K&F Concept
  • K&F XV37 77mm Fader ND Filter Neutral Density Variable Filter ND2 to ND32 【Material】 ND Filter: Made by Completed Professional Optical Glasses instead of Optical Resin. filter reduces the intake of light without affecting the overall color balance.
  • KF01.1063
  • Availability: In Stock
  • 62.99
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K&F XV37 77mm Fader ND Filter Neutral Density Variable Filter ND2 to ND32
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Features
  • • 【Material】 ND Filter: 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.
ND FILTER
Reduces the amount of light entering the lens, thus decreasing camera shutter speed. Useful for situations where motion blur needs to be created (rivers, waterfalls, moving people) or large apertures must be used with flash to avoid overexposure.
Without ND Filter
Use Contrast
With ND Filter
Without ND Filter
With ND Filter
Enables slow shutter speeds to be used to record movement in subjects such as waterfalls, providing a silky smooth affect to flowing water.
Without ND Filter
With ND Filter
Without ND Filter
With ND Filter
NO ND
ND8
ND64
ND1000
No Filter
ND2
ND4
ND8
ND16
ND32
Multiple layer nanometer coating
Reduction of reflection
Scratch Resistant
Nanometer Coating
Enables slow shutter speeds to be used to record movement in subjects such as waterfalls, providing a silky smooth affect to flowing water.
NDnumber Optical density f-stop reduction Fractional transmittance
  0 0 100%
ND2 0.3 1 50%
ND4 0.6 2 25%
ND8 0.9 3 12.50%
ND16 1.2 4 6.25%
ND32 1.50 5 3.13%
ND64 1.8 6 1.56%
ND100 2 623 1%
ND128 2.1 7 0.78%
ND256 2.4 8 0.39%
ND400 2.6 823 0.25%
ND512 2.7 9 0.20%
ND1024/ND1000 3 10 0.10%
ND2000 3.3 11 0.05%
ND4000 3.6 12 0.025%
ND8000 3.9 13 0.0125%
ND32000 4.5 15 0.003%
Overall Rating   4.6   
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09/05/2019
5
Works Great With iPhone, Moment Wide and case - no X - on Snoppa Atom.
 I tried several of these type of variable filters. All exhibited horrible image artifacts, making the footage unusable on wider lenses. There are several VERY expensive ones promising no artifacts. They all have limited range, just like the K&F Concept Fader ND. This one really works. For the higher range, some make you buy another $300+ fader, which I believe consists of one ND polarizer and another clear one. I am cheap, so I put another MRC coated ND, to extend the range. It works great as far as I can tell. I don't have to drag (and field change) multiple ND filters.As far as the size goes, unfortunately, the iPhone image stabilization cause very bad vignetting with the wide lens, so I had to use large diameter fader. I could balance it all on the Snoppa Atom with minimum of counterweights.
Works Great With iPhone, Moment Wide and case - no X - on Snoppa Atom. Works Great With iPhone, Moment Wide and case - no X - on Snoppa Atom.
27/02/2019
5
No 'X' problem anymore
At time of this review I have had the filter for roughly 4 days.Easily my favorite attribute about this filter is the lack of 'X' problems with photos. With many variable neutral density filters you can spin the filter too far and create an 'X' unintentionally. K&F have solved this issue by only allowing the filter to twist to a certain spot so the use will not accidentally ruin any photos. The filter feels very rugged and sturdy. The portion of the filter that does not spin has grooves on it to easily hold on and twist the outer ring. Great product so far.
No 'X' problem anymore No 'X' problem anymore
28/08/2020
4
Very, very difficult to screw on, but great filter!
I find that the picture quality is awesome, but for some reason, this filter is SUPER DIFFICULT to screw onto any of my lenses or step-up rings. It's the right size and after struggling for up to a couple of minutes to line up the threads perfectly to screw the darned thing on. Once it starts going on (I've confirmed that I'm not cross-threading it) it's super tight. Idk if I got a dud, but it's crazy how difficult it is to screw on and that's incredibly frustrating in the moment! It'll never fall off from twisting the adjustment ring, on the bright side.
28/08/2020
5
Great for the price
For a filter that is used rarely, I love the fact that it didn't break the bank. I use this for outdoor portraits with a strobe of course and this filter. Gives me many options to open up my aperture wide and keep my shutter speed below 1/250 sec. with a strobe. Nice warm and smooth images. Used on a NIKON D3S 77mm fit to my 70-200mm lens. Good purchase and very happy with it.
27/08/2020
5
Nice quality ND filter Sharp Images
I had use a few ND filter but all make the image very soft, but this one is great !With this K&F Concept I get very sharp image in all range from ND2 to N32, also no black corners.I have use this 77mm with a 67 mm lens with an adapter and work great.I really like this filter for the price and also like the its carrying case which is nice made and protective.
Filter
size 77mm
Transmittance
Multi-Coating
Antireflection
waterproof
scratch-resistant
HD
Filter Material Optical glass
Pattern
Filter Thickness 7.3mm
Shape Circle
Ring Material Aviation aluminum alloy
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These images belong to K&F Concept end users.

Image Lens Filter Size (mm)
135mm F2.0 ED UMC 135mm F2.0 ED UMC 77
3M-5A-MC 500mm f/ 8 3M-5A-MC 500mm f/ 8 77
3M-5A-MC 500mm f/ 8 3M-5A-MC 500mm f/ 8 77
Angenieux 28-70mm f/ 2.6 Angenieux 28-70mm f/ 2.6 77
Bower 24mm f/ 1.4 Bower 24mm f/ 1.4 77
Canon EF 100-400mm f/ 4.5-5.6 L IS II USM Canon EF 100-400mm f/ 4.5-5.6 L IS II USM 77
Canon EF 100-400mm f/ 4.5-5.6 L IS USM Canon EF 100-400mm f/ 4.5-5.6 L IS USM 77
Canon EF 16-35mm f/ 2.8 L USM Canon EF 16-35mm f/ 2.8 L USM 77
Canon EF 16-35mm f/ 4 L IS USM Canon EF 16-35mm f/ 4 L IS USM 77
Canon EF 17-35mm f/ 2.8 L USM Canon EF 17-35mm f/ 2.8 L USM 77