82mm Fader ND2-ND32 (1-5 Stop) Variable ND Lens Filter Neutral Density Filter for Camera Lens NO X Spot Nanotec Ultra-Slim Weather-Sealed

SKU: KF01.1064

Q
What’s the difference between this and the k&f nd2-400 with blue coating? How come it’s cheaper?
Answer Question
A
this one has better nano coating layer and it has no X cross on images when adjusting to the max stop, while the k&f nd2-400 don't.