The PT-EX610 supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) data projector, which is the most frequently found resolution supported by comparable spec projectors that have been available for a similar time to the PT-EX610.
A 1920 x 1200 (WUXGA) graphics resolution is actually the best supported resolution across all 2000:1 contrast ratio multimedia projectors that are a similar age to the PT-EX610.
Across similar types of data projector the worst supported resolution is 640 x 480 (VGA).
We think you might also be interested in some of the alternative multimedia projectors that support a resolution of 1280 x 800 (WXGA)|1920 x 1200 (WUXGA)|640 x 480 (VGA) currently available including the PT-EW540, or the PT-EW540 both from Panasonic which has a better Rating.
If the resolution of this 2000:1 contrast ratio multimedia projector is too low for you then you might also want to consider the Benq PX9210 (640 x 480 (VGA and cheaper)|1920 x 1200 (WUXGA and cheaper) and cheaper) or the Benq HC1200 (£2,348.37) (1600 x 1200 (UXGA and higher rated)|1920 x 1080 (HD 1080 and higher rated)|640 x 480 (VGA and higher rated) and higher rated).