77mm ND Filters ND2-32 Adjustable, HD Ultra-Thin brass Frame, 36-Layer Anti-Reflection Green Film, Nano-Xcel PRO Series
SKU: KF01.1998
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Hello, the VND filter is 5 stop adjustable.
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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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The design allows us to avoid vignetting when using this filter on non-wide angle lenses, but it can still occur if your focal length is less than 24mm.
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The hood cannot be installed. In order to avoid the problem of vignetting, the filter especially increases the aperture of the clear light, and the outer diameter of the frame is also increased.
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There is a front thread, allowing another filter to be installed in front of the black soft filter, as long as the larger diameter is the same. For example, the filter is 67mm, then you need to install 72mm
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The lens cap can be attached, but need to add 1 size lens cap. For example, if you buy a 67mm filter, then you need to install a 72mm lens cap.
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36-layer K&F Concept exclusive coating technology
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All adjustable ND filters have this problem. The larger the focal length used, the less the cross shadow will be affected. There will be obvious cross shadows and vignetting in the large light reduction gear. If you continue to rotate, the shadows will disappear naturally. This is a physical phenomenon, not a product problem.