123" Diagonal Ultra Short Throw Projector ALR Screens
123″ Screen Viewing Distance: THX’s recommended viewing distance from screen surface to eyes when seated for a 123-inch diagonal 16:9 aspect ratio projection screen is 13.8 feet (about 165 inches) for full immersion, while their max recommended viewing distance is 19.4 feet (about 232 inches). SMPTE’s maximum recommended viewing distance for a 123-inch diagonal screen is 16.7 feet (about 200 inches).
123″ Image Width and Height: The rectangular dimensions for an exactly 123-inch diagonal 16:9 aspect ratio projected image onto a perfectly-flat, vertical wall are 107.2 inches wide by 60.2 inches high.
123" Wall-Mounted, Fixed-Frame UST CLR Screens
Elite Screens and their subsidiary brand Akia Screens both offer wall-mounted, fixed-frame 123-inch diagonal CLR (Ceiling Light Rejecting) projection screens designed specifically for an ultra short throw projector which produce contrast levels that are up to 100 times greater than standard matte white screens. Each of them are delivered to your home unassembled, so you and a helper will need to properly assemble it, align it with the projected image, and permanently mount it to the wall behind your UST projector.
The top-of-the-line Elite Screens AR123H-CLR Aeon CLR Series [manufacturer’s link] [available at Amazon] is an Edge-Free Ceiling Light Rejecting wall-mounted, fixed-frame projection screen with an ultra-thin 0.4″ frame width that utilizes 0.6 gain StarBright CLR material which absorbs up to 95% of overhead lighting and provides the widest-possible viewing angle of 180°. An LED back-lighting kit is included. Actual screen dimensions after assembly are 107.4″ wide by 60.8″ high by 1.3″ deep.
The next step down Elite Screens AR123H-CLR3 Aeon CLR 3 Series [manufacturer’s link] [available at Amazon] utilizes slightly-higher 0.8 gain CLR 3 material which absorbs up to 90% of overhead lighting, provides a 170° viewing angle, and also includes an LED back-lighting kit. This screen can also be purchased as part of a bundle together with the Samsung SP-LSP9T ultra short throw projector at Amazon.com.
Looking for the lowest-priced 123″ diagonal UST CLR screen currently on the market, and don’t care about an LED back-lighting kit? The Akia Screens AK-NB123H-CLR4 CLR 4 Series [manufacturer’s link] [available at Amazon] also features a 0.8 gain, absorbs up to 90% of overhead lights, and provides a 170° viewing angle.