Da-Lite > Product Information > Product Catalog > Electric Screens > Dual Masking Electrol   Dual Masking Electrol Product PDF Installation Manual (PDF)   Ideal for home theaters or where a variety of image formats are projected. View from "Letterbox" to "NTSC" format or from "HDTV" to "NTSC" format with concealed-in-the-ceiling screen. Second motor lowers and raises black masks into position to convert screen to different format. Patented in-the-roller motor mounting system for quiet operation. Unique "step-back" masking design eliminates shadows. All fabrics listed below will be seamless. Viewing Area   HDTV VIDEO (1.78) NTSC (1.33) H x W   in./ft. cm.  Matte White 45" x 80" 45" x 60" 114 x 203 114 x 152 50" x 89" 50" x 67" 127 x 226 127 x 170 60" x 107" 60" x 80" 152 x 272 152 x 203 69" x 123" 69" x 92" 175 x 312 175 x 234 87" x 155" 87" x 116" 221 x 394 221 x 295   Viewing Area   LETTERBOX (1.85) NTSC (1.33) H x W   in./ft. cm.  Matte White 50" x 92 ½" 50" x 67" 127 x 235 127 x 170 60" x 111" 60" x 80" 152 x 282 152 x 203 69" x 128" 69" x 92" 175 x 325 175 x 234 87" x 161" 87" x 116" 221 x 409 221 x 295     For pricing information, please contact Media Fabricators, Inc. via e-mail at [email protected] or via telephone at 323 937 3344.