Aurora Aperture PXND2K-72 Powerxnd 2000 Variable ND Filter Fader, 72 mm Audio Interface Bundle If using a multiple keyboard

If using a multiple keyboard setup and the keyboards are all plugged into a single instrument amplifier

The Marumi 62mm EXUS Lens Protect Filter is a simple

Marumi Digital High Grade Circular Polarising Filters have been specially designed with Digital Photography in mind

high performance converter technology

Aurora Aperture PXND2K-72 Powerxnd 2000 Variable ND Filter Fader, 72 mm Audio Interface Bundle If using a multiple keyboardThe Aurora Aperture 72mm 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 72mm 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