Projection screen WIEN   Characteristics Rating Front Projection ☻☻☻☻☻ Rear Projection - Neutrality of Colour Reproduction ☻☻☻☻☻ Brilliance of Colours ☻☻☻☻☺ Contrasts ☻☻☻☻☻ Brightness ☻☻☻☺☺ Freedom from Hotspot ☻☻☻☻☻ Angel of view ☻☻☻☻☻ Use with Ambient Light mid -> bright   Special Features light-grey high-contrast screen providing extraordinary results in combination with modern bright projctors. Best used when ambient light is not controllable. Nearly light impervious Projection screen BLACKBACK   Characteristics Rating Front Projection ☻☻☻☻☻ Rear Projection - Neutrality of Colour Reproduction ☻☻☻☻☻ Brilliance of Colours ☻☻☻☻☻ Contrasts ☻☻☻☻☺ Brightness ☻☻☻☻☻ Freedom from Hotspot ☻☻☻☻☻ Angel of view ☻☻☻☻☻ Use with Ambient Light low   Special Features classic, bright-white screen, lightimpervious; higher thickness allows use as roller screen; laying pleats may last