Brightness - Measured in ANSI Lumens
It is important to consider the brightness of the room environment. No matter how powerful your projector, you generally can't compete with the sun unless you are prepared to spend a small fortune. When thinking about where to put your projector and screen, consider where sunlight comes into the building and see if you can put blinds up if necessary.
Resolution - The more pixels the better
Here are the most common Resolutions you'll find in church AV systems:
SVGA - 800 x 600 pixels
XGA - 1024 x 768 pixels
SXGA - 1280 - 1024 pixels
Here are (nearly) all the 4:3 ratio resolutions for reference:
VGA - 640 x 480
SVGA - 800 x 600
XGA - 1024 x 768
WXGA - 1280 X 768
SXGA - 1280 X 960
SXGA+ - 1400 X 1050
UXGA 1600 X 1200
QXGA 2048 X 1536
And here are TV resolutions for reference!:
SDTV: 480i (NTSC, 720×480 split into two 240-line fields)
SDTV: 576i (PAL, 720×576 split into two 288-line fields)
EDTV: 480p (NTSC, 720×480)
EDTV: 576p (PAL, 720×576)
HDTV: 720p (1280×720)
HDTV: 1080i (1280×1080, 1440×1080, or 1920×1080 split into two 540-line fields)
HDTV: 1080p (1920×1080 progressive scan)
SVGA - 800 x 600 pixels
XGA - 1024 x 768 pixels
SXGA - 1280 - 1024 pixels
Here are (nearly) all the 4:3 ratio resolutions for reference:
VGA - 640 x 480
SVGA - 800 x 600
XGA - 1024 x 768
WXGA - 1280 X 768
SXGA - 1280 X 960
SXGA+ - 1400 X 1050
UXGA 1600 X 1200
QXGA 2048 X 1536
And here are TV resolutions for reference!:
SDTV: 480i (NTSC, 720×480 split into two 240-line fields)
SDTV: 576i (PAL, 720×576 split into two 288-line fields)
EDTV: 480p (NTSC, 720×480)
EDTV: 576p (PAL, 720×576)
HDTV: 720p (1280×720)
HDTV: 1080i (1280×1080, 1440×1080, or 1920×1080 split into two 540-line fields)
HDTV: 1080p (1920×1080 progressive scan)
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