The Optoma EW556 has a maximum resolution of WXGA (1280x800). That's 30% more resolution than the most frequently found native projector resolution of XGA (1024x768).
A WXGA (1280x800) native projector resolution is in fact the best resolution across all projectors of a similar spec and age to the EW556.
The worst resolution amongst similar types of projector is SVGA (800x600).
We compared this multimedia projector to all the other data projectors that have a resolution of WXGA (1280x800) and we think a cheaper multimedia projector such as the Benq MW523 or you might consider a better rated multimedia projector such as the Benq MW663 (£580.08) are also worth considering.