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One front projection screen, four projection formats. Everything you could possibly want in a tab-tensioned projection screen! Ceiling-recessed, its motorized screen and masking system are linked electronically provide four different projection formats at the touch of a button, all in a ceiling-recessed Access case. A flat black mask on a second motor-in-roller converts the projection screen to your choice of four formats: 1:1.33 NTSC, 1:1.78 HDTV, 1:1.85 WideScreen and 1:2.35 CinemaScope. During format change, the center line and width of the viewing surface remain constant while the mask and projection screen move simultaneously into their factory preset positions. Motor-in-roller is mounted on special vibration insulators so operating noise is dramatically reduced. The screen surface consists of a reflective vinyl with no textile backing, and is tab-tensioned for improved image clarity.  The surface is stretched flat, resulting in better picture quality. 

Three surfaces from which to choose:
M1300—Extremely broad light dispersion and spectral uniformity. Panoramic viewing angle and true color rendition. Recommended for use with any type of projector in rooms where the light level can be reasonably controlled. Gain 1.0

HiDef Grey—A grey front projection surface that provides greater contrast and black reproduction than standard surfaces, with a lower gain to handle today’s super-bright projectors. The grey allows for more ambient light in the audience area than traditional surfaces. Gain .9

M2500—A high-contrast front viewing surface, with excellent resolution and high gain. For data-graphics projectors producing up to 1000 ANSI lumens. Tolerates a higher ambient light level than most other front projection screen surfaces. Gain 2.1