12000→2100 VIVITAR Neutral Density Filter Series 1 Variable NDX Neutral Density ND2 to ND1000 Used about twice, but I'm selling it because it no longer fits after I switched my camera to full-frame. With this one filter, you can freely adjust the neutral density without having to swap out ND2, ND4, ND8, ND32.....ND400, etc., which have the same function. By rotating it, you can create the subject you envision. There are no scratches or clouding, but please understand that this is a used item before purchasing.