Originally Posted by noah katz
"So it sounds like this projector won't work for people who have to place the projector with the lens centered near the top of the screen on a shelf mount."
It depends on what exactly they mean by the lens shift spec; some mfgr's give referenced to the center of the screen and some from the top.
If it's not the latter, then they just shot themselves in the other foot re placement options.
FWIW, Optoma stated the HD80's offset spec as being 136%, with reference to the top of the screen. In practice I think its closer to 134.5 % according to their distance calculator.
I have seen the HD8200's vertical lenshift stated as 105 to 130 % but this was non-official publication.
This may be ceiling mountable even with a very long throw, unlike the HD80.
HD80 on table top, 6m away, top of image is 216 cm (7 feet !) above PJ lens.
HD8200 on table top, 6m away , (least lensshift offset is 105%) top of image is 30cm above PJ lens.
Given this range of lensshift, it should be possible to have the base of the image level with the lens, which is better suited to ceiling mounting ie. no need for a long drop pole if you don't have a very high ceiling.
Hopefully someone else can verify this interpretation/calculation.
The TR on the HD80 was 1.85-2.22:1, therefore the zoom is more powerful on this PJ (TR 1.495-2.28:1)
This PJ is a 6 segment colour wheel. the HD80 was 7 segment and 6x wheel speed. I wonder what speed this PJ is ?