The Optoma S312 has a maximum resolution of SVGA (800x600). That's 39% less resolution than a XGA (1024x768) data projector, which is the most common resolution.
A SVGA (800x600) projector native resolution is in fact the worst resolution across all 20000:1 contrast ratio projectors that have been around for more than a year.
The best resolution across comparable types of projector is 1080p (1920x1080).
What does "projector native resolution" mean?