Variable neutral density filter provides the equivalent brightness range of ND 2 to ND400. Variable neutral density filter could be adjusted ... from ND2 to ND 400 freely.Size:25mm,27mm,28mm,30mm,30.5mm,34mm ... /o water repellent, Multi-coated with water repellent. MC Variable ND filter 49mm,52mm,55mm,58mm,62mm,67mm,72mm,77mm,82mm ...