The highest resolution supported by the Acer P1283 is 1920 x 1200 (WUXGA). That's 20% more resolution than a 1600 x 1200 (UXGA) data projector, which is the most frequently found resolution supported by projectors of this spec and age. In addition, this Acer projector supports a graphics resolution of 1024 x 768 (XGA).
A 1920 x 1200 (WUXGA) graphics resolution is actually the best supported resolution across all 13000:1 contrast ratio projectors that were released more than two years ago.
Across comparable types of projector the worst supported resolution is 640 x 480 (VGA).