milacqua
09-15-07, 08:55 AM
Right now I have the Mits sitting on a small box to the side of my sofa about 12' throw from a temporary roll up screen (84" diagonal). It is perfect. But here is what I would like to do. Mount the projector on a wall 16' from the screen and directly behind the seating area. The lens will be about 7.5 feet from the ground. According to the projector calculator a 110" diagonal screen would work but I am wondering about the distance from lens to the floor. Will this send my picture too high up the wall? I really can't mount the projector any higher than 7.5 feet from the floor. Also, I do not want to keystone much at all.
From what I have read, the Da-Lite HP rocks but might not be good in this application as best results would seem to be from a direct line of sight from lens to screen center. Does anyone have a good fixed (or manual roll down) screen they could recommend in 110" that would work for this application? Thanks in advance!
Skyhawk
09-15-07, 10:58 AM
You'll likely have about 1 1/2 feet between the bottom of your screen and the floor. Why the HP? Is ambient light a problem in your setup?
jrwhite
09-15-07, 11:04 AM
Hi Marty,
You won't get the gain advantage of the HiPower, but you will get the 'wave' advantage. Virtually all non tab-tensioned pull-down screens have waves. Retro-reflective screens like the HiPower and Greywolf mask the visual effects of waves in the material.
Don't be too worried about a little keystone correction. Try it yourself on your Mits and see.
Jonathan
milacqua
09-15-07, 02:30 PM
You'll likely have about 1 1/2 feet between the bottom of your screen and the floor. Why the HP? Is ambient light a problem in your setup?
Yes, I can't really control the light although I just put up some insulator panels today. It does make a lot of difference but still too much light until a bit later when the sun moves. The only reason I mentioned the HP is that I heard it was a great screen. 1 1/2 feet between the bottom of the screen and the floor, eh? Well, that is about 10" too low for my preference but, like jrwhite said, I just might fool around with the keystone in my present set-up and see what that is all about. I did not want to fool with keystone at all only because I heard it is better not to use it. But, like anything, I really should experiment a bit.
Skyhawk
09-15-07, 10:02 PM
Yes, I can't really control the light although I just put up some insulator panels today. It does make a lot of difference but still too much light until a bit later when the sun moves. The only reason I mentioned the HP is that I heard it was a great screen. 1 1/2 feet between the bottom of the screen and the floor, eh? Well, that is about 10" too low for my preference but, like jrwhite said, I just might fool around with the keystone in my present set-up and see what that is all about. I did not want to fool with keystone at all only because I heard it is better not to use it. But, like anything, I really should experiment a bit.
Why not go for a 120" screen, then you can zoom a little bit and get it perhaps 4 more inches closer to the floor ;)
But seriously, I find that when you get past 100" at 16', the skewed image doesn't look skewed if you're only talking inches lower past optimal by tilting the projector a bit. Any slight spillage can be absorbed by a felt border if you have one (since the image wont fit the screen perfectly). At your specs, you're probably only talking about a 1" width image difference (16:9) between the top and bottom of your screen if you tilt to get your desired height off the floor. Since I'm guessing here, I'd just try it and see and you may find you don't need keystone at all. But yes, experiment by all means.