DIY Granddad (w/help)
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
Mentioned: 75 Post(s)
Tagged: 5 Thread(s)
Quoted: 1767 Post(s)
With a "Scope" screen's reduced height, (...mounted down further from the ceiling and up from the floor...) and if both room-based reflections and ambient light are under control, you will still need to use a silver Spandex, one with a slight degree of sheen. Your screen size and throw distance, combined with the Sony's lower lumen output, requires your surface to be at least 1.5 gain just to achieve 12 foot lamberts...and that's not even considering the drop in brightness you'll get if 3D is engaged.
Moving the PJ up to 14'-4" will help considerably. Cutting back screen size to a maximum of 115" diagonal in 2.35:1 even more so.
You'll have to explore your options as to just how ideally suited your plans are to your realities. The Sony...quite frankly, is you biggest limiting factor in it all.