I have been going back and forth with your calculator to get the highest gain I can of the Da-Lite HP screen and need some help. There are some items that cannot change at all. My inputs are listed below (* cannot be changed)
Screen width will be 113"*
Center of screen will be 68" (bottom of screen is 36" AFF)*
Viewing distance is 17' (204")*
Distance to left or right of projector - 36"*
Center of lens from floor - 68"
Viewing eyes height is 37"*
When I have all of this before inputing the distance from left to right it shows a gain of 2.02. But after this is it reduces both left and right to 1.52 gain. With this low of a gain the HP may not be the screen for my setup. But if I lower the PJ 60" AFF it increases the gain to 1.65 and at 55" it is up to 1.71. But this is still a long way from the gain of 2.02 before the left and right distances are imputed.
The key question is why does the seating left and right change the gain so much. Obviously everyone cannot sit directly under the PJ. Is this correct? The other key question is I thought the projector being in the center of the screen was one of the key ingredients for higher gain.
If everything is correct then the only option I have is to have the PJ lower than the center of the screen. I will be ceiling mounting the projector and already have an extension pole for this - so I can lower it some. The PJ will be over a table that is between the two chairs.
Sony XBR-75X850C - Living Room
Samsung UN60J6300AFXZA - Bedroom