KV37 37mm Fader Variable Adjustable ND Filter ND2-ND400 - Ultra-Slim & Multi-Coated
SKU: KF01.1381
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There is a front thread that allows another filter to be mounted in front of the Black Mist filter, as long as the two larger diameters are the same. For example, the filter is 67mm, then you need to install 72mm
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All variable ND filters have this problem: the larger the focal length used, the less the cross shadow is affected. In the large light reduction gear, cross shadow and vignetting appear obviously. As you keep rotating, the shadows will naturally disappear. This is a physical phenomenon, not a product problem.
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Lens caps can be installed, but lens caps need to be increased by 1 sizes. For example, if you buy a 67mm filter, you need to attach a 72mm lens cap.
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7.4mm
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Hello, the VND filter is 9 stop adjustable.
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The cover cannot be installed. In particular, to avoid the problem of vignetting, the filter increases the opening of the clear light, and the outer diameter of the frame is also increased.
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No, there is no structural limit.
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From 1 to 5 stops there is a slight X cross for lenses under 24mm. An X cross will appear at the highest stop, which can be removed by rotating the filter ring, which is a normal situation and not a quality issue.
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Tested with Nikon Z 7 and Nikkor 14-30mm S Line, dark corners are not evident at 14mm and no dark corners at 16mm.
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Because K&F Concept ND2-ND400 filters adjust the amount of light that can pass through polarizing glass, color cast cannot be avoided with all variable ND filters on the market. However, K&F Concept variable ND filters are made with the best coating technology that reduces the effect of the polarizing film on the image color. *Based on our professional test, the color cast of K&F Concept ND2-ND400 filters is around 290,000 while the industry standard is 500,000.