Originally Posted by laugsbach
I have 12FL in a totally dark room using rec709 with a calibrated grayscale and it is plenty bright...
125" AT CIH screen 1.2 gain with a 17' throw...
Thanks laugsbach... That's relief for my movie watching side... Compared to setting up a flat panel TV, there's a lot more numbers to consider here and, since I have no relative baseline - it gets a little daunting. I'd hate to set everything up, only to have the projector display an underwhelmingly washed out image, all due to my lack of planning.
From what I can tell, the image should get brighter when you switch from Scope to 16;9... Do you find this to be the true and how does your image look with some ambient light on - in 16:9 AR? I can dim my lights, but for sports and other HDTV programming, we'd want some lighting... especially when we have company over.
If I need the image a bit brighter, I think I need to move the projector closer to the screen. Using the Projector Central Pro calculator - I see the FL obviously goes up as you move the projector closer to the screen... but not too close! The Panasonic website has the following info for calculating throw ranges.
The values of L shown above vary due to characteristics of the zoom lens. Images may slightly distort due to characteristics of the zoom lens when the zoom lens is set to the minimum throw distance.
I find it odd that the PC calculator shows a minimum throw distance of 14.5 feet, but the Panasonic website provides the following formulas.http://panasonic.net/avc/projector/products/ae8000/positions.html
Aspect ratio2.35 : 1 (When projecting both 2.35:1 and 16:9 images onto a 2.35:1 screen using the Lens Memory function.)
minimum - L (m) = (diagonal screen size in inches) × 0.0241 - 0.045
maximum - L (m) = (diagonal screen size in inches) × 0.0482 - 0.044
The accuracy of calculated value by the formula shown above is ±5%
For a 140" screen that comes out to about 10' 11 inches up to 20' 8"... So maybe I can place the projector closer than the PC Calculator's minimum distance. Am I missing something here?
I would not use the minimum throw distance, but it looks like I could place it closer than my planned 15'. At 13' feet it would be right overhead.. and any closer will put it out in front of us... it will be ceiling mounted but not sure that is a desirable placement.
I wonder if others have their projectors ceiling mounted, but in front of their seating placement.
What factored into your decision to set your throw distance at 17'?
OIE, so many questions...