Originally Posted by shanksworthy
Wouldn't the light then have to reflect back onto the screen to wash it out? Seems like it would have to take a pretty long path and reflect off many more surfaces (e.g. the walls, the floor, the back of the room...) to get back to the screen, by which time there wouldn't be enough of it to cause the issues I'm seeing...
Here's an idea to test what is having the greater effect on contrast:
You could use a 50% black/50% white(or gray) test pattern from Avia or other calibration disk, and with you seated in the main viewing position, have someone hold their hand a foot or so in front of the black half of the screen to compare black levels for the following:
a) projected black, which will show you the combination of reflected/ambient light and the black-level limitations of the Z3,
b) the shadow the hand casts, which removes the Z3 from the equation, but will show you the best you can do with ambient/reflected light from a projected image on your screen, and
c) real black from the border of your screen (for reference).
If I'm saying this correctly, if b is closer in blackness to a (indicating ambient light is washing out the screen), then the screen/room is the bigger problem. If b is closer in blackness to c (indicating the Z3 black level is bad), then the Z3 is the bigger problem.