Originally Posted by copene
I'm going to ceiling mount the projector in the first third of the allowed throw range, make sure it's a perfect rectangle and size then make all the markings to mount the screen. Glad to read that the screen can be slid horizontally if need to be to make up a few mm or error.
I figure if I'm in the lower third of the throw I have wiggle room back and forth a bit.
Last thing, do you measure "from the lens" literally or from the front of the case of the projector? Like the lens is an inch depressed into the case. Is that the ACTUAL start where you measure from?
Measurement is from the center of the lens.
I'm not sure if the depression is taken into consideration, probably is from the vertical plane that the end of the case is.
LE: when using the zoom, the length of the cylindrical objective can move back and fourth.
That dimension is not noted in the manual.
So it's probably where the center of the lens would be if it were touching the case wall.
Also, the closer a projector is, the brighter it will be.
LE2: I think I mentioned it before, there is an side effect of projectors with color wheels called RBE/Rainbow Effect. Only some people are susceptible to seeing it.
The Viewsonic has a color wheel. Could try it and see if there is an issue.
It shows up as strobe lights, on bright parts of the screen.