Originally Posted by m Robinson
"If using a mirror, pay attention to the geometry as you will get light thrown back from the screen and you don't want this reflected back again via the mirror."
This is a very crucial point and is driving some of the decision making for the lens length. This design criteria is known as critical angle analysis. There are geometric constraints which when correctly observed, will avoid this ghost producing, contrast killing and resolution killing artifact. Our Engineering staff are well aware of this and will avoid it.
My major concern on the short viewing distance options would be content related. If there are multiple sources of varying resolution, as is typical in a home, the old adage, Garbage in Garbage Out will apply and some sources just don't belong on a display of that scale, at that viewing distance.
In my own use of a 54" by 96" (firehawk) image at home Any 1.78 sources I use like NTSC widescreen DVDs and HDTV from satellite are fine at 14 feet or so. Lower res shows are typically 1.33 and much smaller, Seinfeld looks fine at this 90"diagonal size. Actually most of the complaints I have about lower resolution material is the conversion process to the displays resolution. My sister has an old NTSC Mitsubishi front projector on a 100" screen and it looks better on broadcast NTSC than most any newer digital display.We are planning to use the new Lumagen Radiance processor to improve the lower resolution material.
So it seems with a constant height the higher resolution is there when the screen is in the wide or widest modes. Obviously a 1920 by 1080 DVD player is a must.
This clients best seats are probably going to be 15 to 20 feet. We are still waiting for the interior designers to chime in. Thanks