The Multi-Mask Imager is a fixed frame screen that features both horizontal and vertical masking and is available with a choice of eleven projection screen surfaces. With all masking retracted, the screen is HDTV (1.78:1) aspect ratio. With motorized masking, you can achieve NTSC Video (1.33:1), Letterbox (1.85:1) and Cinemascope (2.35:1) formats. Da-Lite's Multi-Mask Imager is standard with the Pro-Trim finish, which is a fabric frame covering that aesthetically enhances the appearance of the installation while absorbing light that surrounds the viewing area. Front projection surfaces standard with black backing for opacity.