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Discussion in 'Archived Threads 2001-2004' started by Mark Shannon, Mar 3, 2003.
ok...what is keystoning, in relation to fptv's?
This is when the screen image looks like a trapezoid.
And it's caused by not aligning the projector properly with the screen.
In my room, the ceilings are almost 13ft high. Even though my screen is fairly large and mounted fairly high (50") off the ground, I had to use some minor keystone correction because the mounting pole for my projector drops the projector's lens about 2.5ft from the ceiling (approx 10ft off the ground). In most cases, the overhead projector should be mounted at or close to the level of the top of the screen to avoid getting a trapezoidal picture or to avoid using keystone correction.