Products: Rosco

Constant fussing with hard gels over windows and changing out
various strengths of ND filters won't be part of your shooting regimen
if you buy into Rosco View.

The two-part system consists of a wide-width
polarizer filter in gel form and a matching optical-glass polarizer
camera filter. Using the two together, you can control exterior
brightness as seen through windows without affecting the lighting and
exposure within the studio or set. By simply rotating the camera
filter, you can change the degree of cross-polarization viewable on the
window where Rosco View gel filter is placed. Rosco claims you'll have
only one stop of compensation at the camera. www.rosco.com