Originally Posted by tellhigh
I mounted using peerless universal mount, but on my 16x9 screen i am not getting picture on the entire screen. It is sort of trapezoid shape. What am i doing wrong? Is it lens shift or the projector height from the ceiling?
Someone will correct me if I'm wrong, but if top or bottom is larger then your projector is tilted towards the floor or ceiling and if one of the sides is longer than the other then your projector needs rotating.
Does your mount have independent adjustments for each of the 3 axis? My original mount was a ball joint like mechanism where you had to set all 3 at once by just moving the projector around on the ball and then hold with a set screw. With a light projector like the Sanyo Z2 I had at the time, it wasn't hard, but with a heavier projector it proved impossible even though I was well within the weight limits. My current mount lets me make micro adjustments in one axis, set it, and move onto the next. With a small spirit level, it takes just. a few minutes and no swearing
You can start by trying to make the projected image a rectangle (even if it shows above, below or to the side of the screen), and when you get it close use the lens offset to get it on your screen. You can then make the final adjustments to get it "square" and aligned with the screen.