Projector Reviews

The top chart shows the gray scale of the PLUS projector relative to its color temperature at various levels of intensity, or brightness (20 IRE is dark gray; 95 IRE is bright white). The gray scale, as set by the factory, in the most accurate menu setting measures 7,200 Kelvin with dark images and leans more toward 6,600 K with brighter images. After making adjustments with the limited user controls, using the Photo Research PR-650, the gray scale has the same downward tilt measuring between 6,800 K at the darker end and 6,300 K at the lighter end. The bottom chart shows the gray scale (or color temperature) relative to the color points of the red, green, and blue color-wheel filters. The color points don't quite match those specified by SMPTE. Green (0.272, 0.66) is slightly more saturated, which is OK. Red (0.605, 0.349) is slightly less saturated, although not by too much. Blue (0.152, 0.076) is fine, as usual. The gray scale appears as a large smudge before calibration and is more centered and defined around the D6500 K point afterward. The light output was approximately 12.5 foot-lamberts on a 6-foot-wide Stewart Studiotek 130 screen. The display has good DC restoration and an excellent color decoder, and it resolves all of the detail available from the source material, up to the limit of the 848 horizontal pixels.—MW