Hi mp20748 it looks to me like your Electrohome have some vertical banding or "ringing" problem in the left side of this picture. Have some of the same problem on my electrohome 8500 ultra with 1080P@60hz.
Here are some of my 8" electrohome pictures
10000:1 - 30000:1 contrast , with out an iris .
You think that is good enough ???
More is better, but I think a calibrated "lamp valve" projector with better than 10000:1 in native contrast starts to look ok.
The on/off contrast for a 9" LC CRT projectors is maybe "infinity:1" if mesuared with a lumens number divided by 0, but the actual contrast for the projector showing a picture with some information is something else.
3x white forsfor surfaces with the generated picture information between them in series with 3x wide open F1.15 lenses only with som color corrected C-elements for two of them, may have some internal light polution problems for the actual picture contrast. For example In the Barco Cine9 broshure the Contrast Ratio was rated to >1000:1