Originally Posted by smonska
I only have the top of the screen about 3" below the centerline of the lens, but it seems that using that when using the lens shift this much, it becomes impossible to get perfect focus across the screen and some convergence issues come up.
Okay, that is similar to my current config with the Pana AX100; the center of the lens is about 4 inches below the top edge of the screen. So my screen is a little higher than yours which would indicate that the lens shift on the HC6800 should be able to handle my setup.
The HC6800 is thicker than the AX100 so its lens should end up a little lower even.
I ran the calculator again, with the correct data for my screen size, ceiling height and mount length, without taking into account the lens shift, and came up with the results shown in the attached picture. The documentation says the lens shift can move the picture vertically up to 75% of the image height, which in my case is 42" - so it can be moved ~31" downwards from center.
That is more than enough to fit my constraints. Actually the HC6800 has a larger vertical lens shift interval (75%) than my existing AX100 (63%).
Can someone confirm I am thinking right?