82mm True Color Variable ND2-400 (1-9 Stops) ND Lens Filter Adjustable Neutral Density Filter with 18 Multi-Layer Coatings for Camera Lens Nano-Klear Series
SKU: KF01.2736V1
Q
Why is there vignetting?
Answer Question
A
All adjustable ND filters have this problem, the larger the focal length used, the less the effect of vignetting. There will be obvious cross shading and vignetting at large stops, the shading will disappear naturally if you continue to rotate it, it is a physical phenomenon, not a product problem.