Hello everybody. Very interesting post. Thanks to all of you.
I am presently using a full HD FP (sony's pearl VPL-VW50) with a 1.0 gain screen and I am considering a 3D upgrade.
After carefull examination of all the different technologies, my best approach would be the 2 proj setup with polarized glasses.
(Buying a second-hand pearl when the current owner is wishing to upgrade to 3D with shutter glasses before the end of the year is likely to occur...)
As I understand, one of the issues seems to be brightness.
If I assume:
- 40% transmission due to the proj polarized filter
- 80% transmission for the glasses (should be 100% because the polar axis is the same)
(the above two give about 30% transmission, which seems to be admitted by the community)
- 200% gain because of the 2 proj setup
- lets add a 200% gain average due to the silver screen
In my case, I currently use the economic lamp powering, which can add another 50% brightness when fully powered.
All that gives: 0.4 x 0.8 x 2 x 2 x 1.5 = 1.92
Am I correct to assume that the issue will not be less brigthness, but too many lumens instead ???????????