Join Date: May 2003
Location: Upstate New York
Mentioned: 1 Post(s)
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I’m looking to replace my 92” screen. I’d like a 106” ALR, retractable, motorized, tab-tensioned screen. I was pleasantly surprised when I read about the CineGray (and its much lower cost than other options).
I need some suggestions on measurements to ensure I have the ideal angles for ALR. Below are some of room’s numbers:
1. My throw distance is 11.5 inches, which puts me just about 1.5x the width of a 106” diagonal screen.
2.My projector is about 14” from ceiling. Ceiling height is 7’ 10”.
3. Distance from screen to seating area is approximately 10’.
4. Distance from floor to eye level (when reclined) is maybe 3’ to 4’ (I need to measure this).
I read earlier that ideally I need a throw distance of 1.8x to 2x screen width will minimize hot spotting, But, 1.5x is the furthest I can do (or run into a window). As long as the hot spot isn’t bothersome when one doesn’t try to look for it all the time, I would prefer a bigger screen (and bigger jump from my existing 92” screen).
I am trying to figure out the ideal drop for a 106” screen (distance from ceiling to top of screen) and also the ideal drop of the projector from the ceiling. These are the 2 main variables that I can control. I don’t have much flexibility in seating distance. Maybe I can move seats 1’ forward or back.
I saw the CineGray figure that shows how the 2 angles should be the same. I guess the distances are taken from the middle of the screen? Anyone have any details on doing the calculations? I suppose I’d need vertical distances (projector to center of screen height and eyes to center of screen height), throw and viewing distances from screen, and some old High School trigonometry (inverse tangent?) since it would be harder to measure actual angles with a compass? Or is this getting too derailed and anyone have suggestions or rules of thumb for aforementioned numbers?