The Optoma ES529 has a maximum resolution of SVGA (800x600). That's 53% less resolution than the most common projector native resolution of WXGA (1280x800).
This projector's resolution (SVGA (800x600)) is actually the worst resolution amongst all 3000:1 contrast ratio projectors that have been on the market for more than two years.
Amongst similar types of projector the best resolution is 1080p (1920x1080).
What does "projector native resolution" mean?