Screen Size; Projector Setup - Sony 1270Q CRT Setup And Operation Manual

1.3

Screen Size

The output of the Sony 1270Q is noted to be 650 lumens, or about 200 ANSI
lumens. ANSI refers to a measurement standard, eliminating the bogus
values you sometimes see in literature. I've read that a screen brightness of
10-12 foot lamberts is a good value to shoot for, giving good brightness in a
light controlled environment. The calculation of this is quite simple:
Ft – Lamberts = (ANSI lumens * Screen Gain) / Screen Square Feet
Example: My Setup (200 * 1.3) / (45/12 * 80/12) = 10.4 ft-lamberts
As you can see, my screen/PJ is on the low end of the brightness spectrum,
so to speak. I would really like to go to a 54 x 96 screen, with a 1.5 gain
screen material. I've been looking at screen materials and have seen
absolutely no hot spotting and a very wide field of view with a Stewart 1.5
gain. This will be my screen of choice with my new projector, which will be a
9" with at least an output of 275 ANSI lumens to reach 11.5 or so
ft-lamberts.

2. Projector Setup

There are at least five major/separate general setup procedures. They are
as follows:
Mechanical Setup
Electron Beam Focus (astigmatism)
Mechanical and Electrical Focus
Geometry adjustments / Convergence
Grey Scale (I won't touch this one)