77mm Variable ND Filter ND2-ND400 (9 Stop) Lens Filter Waterproof Scratch Resistant Nano-X Series

4.9 101 101 Review(s) KF01.1465
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Buy 99$-9$, 199$-25$, 299$-39$, 599$-100$
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Brand: K&F Concept
  • Free Shipping & 30-Day No Reason Return. K&F Concept ND Lens Filter is made of Japan-made top optical glass and can be adjusted 360 degrees. Waterproof and Scratch Resistant.
  • KF01.1465
  • SKU: KF01.1465
  • 67.99
Buy 99$-9$, 199$-25$, 299$-39$, 599$-100$
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Description
  • * Putter Design to Adjust 9 Stops - Designed with a putter, K&F Concept variable ND filter can be adjusted by 9 stops from ND2 to ND400. Each stop is marked on frame conveniently for 360° rotated to adjust the stop, multi-scene application.
  • * Optical Glass Construction for Clarity - This ND filter is made of Japan-made top optical glass, effectively reduced reflection from the filter itself and glaring, ensuring a high-quality image and does not affect your images in any way.
  • * Nanotec Coating - Both glass sides of K&F Concept ND filter are multi-coated by the state of art Nanotec coating technology, so the filters are waterproof, oil-proof, and scratch-resistant, protecting your camera lens for an outdoor shooting.
  • * No Vignetting & Dark Corner - For the filter designed with ultra wide-angle design, the ultra slim frame only 7.4mm, supporting in 16mm telephoto and wide angle lens no vignetting , due to the different in lens type and focal length so this filter might be met dark"X" cross , this isn't quality problem , it can disappear via rotating the filter.
  • * 30-Day No Reason Return - Please verify your camera's lens thread size before ordering. Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by a "ø" (diameter) symbol.

Unsure your lens size ? check here

$67.99
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Free shipping worldwide
Sale
Buy 99$-9$, 199$-25$, 299$-39$, 599$-100$
Secure Transaction

Multiple payment options:

Quality Guarantee

Kentfaith items enjoy [Quality Guarantee]. If the item you purchased has quality issues or problems caused by non-users and enjoys "Quality Guarantee", Kentfaith will provide comprehensive after-sales service.

No Reason Return

In order to improve your shopping experience at Kentfaith, the items you purchased (which doesn't apply to giveaways) can be returned for a refund for no reason (such as dislike, wrong purchase, and other non-product quality issues).

Brand Story
K&F Concept Variable ND2-ND400 Filters
K&F Concept Variable ND2-ND400 Filters
K&F Concept Variable ND2-ND400 Filters
K&F Concept Variable ND2-ND400 Filters
Q&A
Q1: How does ND2-400 work?
A1: Two sets of polarizers with high transparency are used to control the amount of light entering the lens through the filter.
Q2: Can the original lens cap be used for ND2-400?
A2: In order to prevent vignetting, the ND2-400 is designed with an ultra-wide angle structure. The front port diameter of the filter is one size larger than the original aperture of the lens, so the lens cap needs to be one size larger than the lens aperture. For example, the 77mm ND2-400 Need to use 82mm lens cap.
Q3: Does ND2-400 have a color cast?
A3: Due to the use of polarizing film to control the amount of light entering, color cast is a common phenomenon among all adjustable NDs on the market. KF relies on mature manufacturing technology and fine coating technology to minimize the polarization effect of the polarizing film.
Q4: Does ND2-400 have vignetting?
A4: Using Nikon Z 7 and Nikor 14-30mm Sline test, 14mm vignetting is not obvious, 16mm has no vignetting.
Q5: Does ND2-400 have a cross shadow?
A5: The maximum aperture of an ultra-wide-angle lens below 24mm will have a slight cross shadow in the 1-5 gear dimming. The longer the focal length used, the smaller the effect of the cross shadow. There will be obvious cross shadows and vignetting in the large gear of dimming. If you continue to rotate the shadows, the shadows will disappear naturally, which is a physical phenomenon and not a product problem.
Functions of ND2-400
Functions of ND2-400
1. Under the premise of ensuring the best iso and not changing the aperture, the shutter speed can be freely changed according to the desired effect
2. Under the premise of maintaining the same shutter speed, a large aperture exposure can be used to create a blurred background effect
3. Even with a shutter speed of 1/8000 sec, the maximum aperture of F1.4 or F1.2 may cause overexposure. In this case, the ND2-400 can easily eliminate overexposure and retain highlight details.
4. Adjustable ND has more applicable ranges and applicable scenarios. If you pursue the ultimate picture quality, it is recommended to choose a fixed value ND.
unique push rod design, easy to adjust
unique push rod design, easy to adjust
Filter pouch included
Filter pouch included
9 stops can be adjusted for different scenarios
9 stops can be adjusted for different scenarios
ND2-ND400 (9 Stops) Variable ND Filter
Comparison
Rating 101 reviews. 26 reviews. 89 reviews. 127 reviews. 49 reviews. 48 reviews.
Price $67.99 $79.99 $56.99 $79.99 $89.99 $62.99
Model KF01.1465 KF01.1853 KF01.1063 KF01.1087 KF01.1815 KF01.1079
Reflectivity
0.2% 0.2% 0.2% 0.2% 0.2% 0.2%
Series
Nano-X series Nano-X series Nano-X series Nano-X series Nano-X series Nano-X series
Recommended Scenes
Video Shooting/Landscape Photography Video Shooting/Landscape Photography Video Shooting/Landscape Photography Video Shooting/ Landscape Photography Video Shooting/ Landscape & Potrait Photograph Video Shooting/Landscape Photography
Function
Light reduction effect 1 Second Switch/No X cross/Light reduction effect No X cross/Light reduction effect Remove glare/No X cross/ Light reduction effect Soft highlight/No X cross/Light reduction effect No X cross/Light reduction effect
Stops
0.3 to 2.7(1 to 9 Stops) 0.3 to 1.5(1 to 5 Stops) 0.3 to 1.5(1 to 5 Stops) 0.3 to 1.5(1 to 5 Stops) 0.3 to 1.5(1 to 5 Stops) 0.9 to 2.1(3 to 7 Stops)
Filter Material
Japanese AGC Glass Japanese AGC Glass Japanese AGC Glass Japanese AGC Glass Japanese AGC Glass Japanese AGC Glass
Multi-Coating
28 layers 28 layers 28 layers 28 layers 28 layers 28 layers
Waterproof
scratch-resistant
HD
Size
77mm 77mm 77mm
Transmittance
Antireflection
Filter Thickness
7.3mm 9.3mm 7.3mm
Ring Material
Aviation aluminum alloy Aviation aluminum alloy Aviation aluminum alloy
Reviews (101)
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5
Surprising
I was afraid I would have problems being a variable ND with rare effects, and zero problems. Neither on the corners, nor at ND400, the truth is that a pleasant surprise for its price. It may have a little green tint, but with a correction of nothing in the Premiere I fixed it, between 5 and 10 points on the dye tab towards magenta and you're done. Highly recommended, you just need to have a cap like the ND2 and ND32 models that are the ones I usually use.
Surprising Surprising Surprising Surprising Surprising
20/05/2023
5
No lens cap will fit except….
If you know who this brand cap is it will fit this filter. I just so happen purchase much lens from a buyer who included this cap with it and it totally fits perfectly. But your normal cap will not.

Anyway I love the filter it does a great job just be aware of the cross viniette.
No lens cap will fit except….
20/05/2023
5
Excellent photographic performance and material care
I got to try this filter for my Sigma 17-50, and the result is really amazing. The product looks great in its really great quality packaging and easy to carry in your bag.
The photographic performance is at a high level at a low price. I find the tongue very interesting, it allows you to have better grip during work.
Excellent photographic performance and material care Excellent photographic performance and material care Excellent photographic performance and material care
18/05/2023
5
K&F Variable ND Filter Good Landscape Filter
I purchased the K&F Concept Variable ND Filter Neutral Density ND2-ND400 (9 stops) with Rotating Ring to be able to use a fast ND with different densities.
The packaging is very well done, solid and space-saving container. The glass filter is light and the ring to increase/decrease the density is smooth. It has no end stop lock.

To test it best I tried it with three different lenses on the Nikon D750 camera (full frame): 20mm, 35mm and 85mm.
- 20mm: in the photos taken with the filter there is no particular loss of sharpness, it introduces a slight hot dominant that can be easily solved in post-production. As far as the X-shape problem is concerned, it is quite marked using the filter beyond the marked ring. Instead, using it within the marked marking, the problem is little present. See image attached.
- 35mm: in the photos taken with the filter there is no particular loss of sharpness, it introduces a slight hot dominant that can be easily solved in post-production. As far as the problem is concerned, X-shape is not as marked as in the previous one, but there is a vignetting especially in the use with maximum effect. See image attached.
- 85mm: in the photos taken with the filter there is no particular loss of sharpness, it introduces a slight hot dominant that can be easily solved in post-production. As far as the X-shape and vignetting problem are concerned, they are not relevant. See image attached.

Optically, the filter is well made and provides excellent results, but I would have preferred a start and end run with lock in order to avoid possible mistakes. Also considering that K&F produces other types of filters but with magnetic connection, I think it could be a further plus for this filter.

The price/performance ratio is correct based on the performance provided.

I attach more photos of the packaging and two shots to the sea.
K&F Variable ND Filter Good Landscape Filter K&F Variable ND Filter Good Landscape Filter K&F Variable ND Filter Good Landscape Filter K&F Variable ND Filter Good Landscape Filter K&F Variable ND Filter Good Landscape Filter K&F Variable ND Filter Good Landscape Filter
16/05/2023
5
Excellent Variable ND filter
Quality, Glass, stop selection. Excellent filter optically superior, image quality, and light control superb.
Excellent Variable ND filter Excellent Variable ND filter
14/05/2023
5
Superb Professional Filter
Very surprised by the quality of the filter, it's from the professional nothing to say. The materials are good and the glass super. The adjustment wheel is very smooth and makes it easy to change the density of the filter. No need to have 4 different filters. possibility to shoot video in full day at the largest aperture. I love it!
It also comes with its small carrying case which is very sturdy and makes it easy to carry without fear of scratching
Superb Professional Filter Superb Professional Filter
11/05/2023
5
ND2-400 K&F Concept 77mm filter
K&F Concept is synonymous with quality. I already had other filters in kit, albeit quite old and with several years of service behind me. By virtue of my imminent photographic journey, I decided to opt for something new, always relying on them. I will tell you in detail what, in my opinion, are the pros and cons of this new product of theirs.
First of all, the packaging is really great: the box is made of very strong cardboard, impossible even to fold, and then the magnetic opening is very pleasant. The filter is stored in a leatherette case with magnetic closure and not plastic, which gives the product a finish that we can call 'premium'. Inside, wrapped in a protective bag, the filter. It is a fairly heavy piece, already to the touch it gives a great impression. The body is made of aluminum, the glasses are of excellent finish. Very thin (and this is good because this reduces any loss of sharpness), waterproof and scratch-resistant. Very pleasant (and very useful!) the orange little thing you need to change the intensity of the filter itself: the only drawback is not having a limited stroke during rotation, but it's not a big deal, since the limitations ND2 and ND400 are indicated right on the end of the filter itself. In any case, the filter was built in such a way that, even if you go beyond the limits, the annoying 'X' shadow does not show up. For the time being, I had the opportunity to try it only in the city on a somewhat ugly day, in the coming days I hope to integrate this review of mine with other shots in the mountains.
Who is the filter addressed to? Surely for those who love landscape photography or for those who want to do long exhibitions in the city (remaining within the limits of 9 stops): of course, the product is not the cheapest on the market, but that's enough try it for a while to understand that it's worth every penny you spend. I'm not a photography
ND2-400 K&F Concept 77mm filter ND2-400 K&F Concept 77mm filter ND2-400 K&F Concept 77mm filter ND2-400 K&F Concept 77mm filter
10/05/2023
5
Not an I-phone for all of your pictures. The tried and true camera photos.
One doesn't have to. The lense filters enhance your hard work with great satisfaction.
08/05/2023
5
I feel satistecho about buying this filter
The filter is of good quality and fills the desired expectations.
07/05/2023
5
A WOW! filter
This is a great product. The packaging is super and it sets onto the lens excellently. I love it!
05/05/2023
FAQs
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A
From 1-5 stops, there will be a slight X cross for lens under 24mm. An X cross will appear at the highest stop and can be removed by rotating the filter ring, which is a normal situation instead of a quality issue. 
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A
Tested with Nikon Z 7 and Nikor 14-30mm Sline, dark corners are not obvious for 14mm and no dark corners for 16mm. 
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A
As K&F Concept ND2-ND400 filters adjusts the amount of light that can pass through with polarizing glass, a colour cast can't be avoided for all the variable ND filters on the market. However, K&F Concept variable ND filters are made by the best coating technology, which reduces the effect of the polarizing film on image color. *Based on our professional test, the colour cast of K&F Concept ND2-ND400 filters is around 290k while the industry standard is 500k. 
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A
To avoid dark corners, K&F Concept ND2-ND400 filters are designed in ultra-wide construction so the front side of the ND filter is one size larger than the camera lens. It is recommended to use a lens hood of a larger size. 
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A
First, K&F Concept ND2-ND400 lens filter allows changing shutter speed based on the effect you want with the best sensibility and the same aperture. Second, K&F Concept ND2-ND400 lens filter allows creating a blurred background with a large aperture while the shutter speed remains the same. Third, K&F Concept ND2-ND400 lens filter is designed to prevent overexposure and maintain image purity and quality at the same time. *Like a zoom lens, the variable nd filters are suitable for multiple shooting situations. If you're looking for perfect image quality, a fixed ND filter is recommended. 
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Video
Variable ND Filter ND2-ND400 (9 Stop) Lens Filter Waterproof Scratch Resistant Nano-X II Series
Do You Know How Your K&F Concept Filters be Produced? | One-day Tour in Production Line
How to check your lens size
Specification
Gimbal Stabilizers
Reflectivity 0.2%
Filter
Series Nano-X series
Recommended Scenes Video Shooting/Landscape Photography
Function Light reduction effect
Stops 0.3 to 2.7(1 to 9 Stops)
Filter Material Japanese AGC Glass
Multi-Coating 28 layers
Waterproof
scratch-resistant
HD