The most important task of ND filters is to reduce predominant ambient light. With a variable ND filter, it is very fast and convenient to adjust the frame rate and/or shutter time to the light conditions. Those who film a lot with a DJI Mavic 2 Pro drone will therefore appreciate variable ND filters. The two glass panes in the aluminium rotary mount of the PolarPro ND Vario filter can be targeted to one of the laser-engraved digits (they mark the aperture levels 6 to 9). Accordingly, the incident light is reduced. PolarPro delivers its ND Vario filters in a luxurious packaging that is quite appropriate to the superior quality of the filters.6-9 Stops VND FilterMade from CinemaSeries glassAerospace aluminium filter holder.Supplied with filter case