Aurora Aperture PXND2K-67 Powerxnd 2000 Variable ND Filter Fader, 67 mm Under $100 the Black version has improved

the Black version has improved circuitry between the DAC chip and analog output

The G-DRIVE mobile USB is bus powered so when you're out and about you don't need to add an external AC power supply to your laptop case

aluminum design to complement your Mac computer

all-aluminum case

Aurora Aperture PXND2K-67 Powerxnd 2000 Variable ND Filter Fader, 67 mm Under $100 the Black version has improvedThe Aurora Aperture 67mm PowerXND 2000 Variable Neutral Density 1. 2 to 3. 3 Filter is a solid variable neutral density filter that is designed to mount onto lenses with 67mm front filter threads and provides an exposure reduction of 4 to 11 stops. The 1. 2 to 3. 3 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled