page 2.6 105-681B January 2007
2. Installation
Digital Projection
LIGHTNING 30sx+m, 40sx+m
User Manual
Notes
This chart has a TRF of 1.0, for
use with the following images:
Choosing a lens using the lens charts
Full width images
Use the chart below to choose which lens best suits your application.
example
•
For a screen width of 10m at a distance of 35m, the 2.77 - 4.51: 1 zoom lens
(107-146) would be best suited.
•
For the same screen size at a distance of 60m, the 4.51 - 7.53: 1 lens (107-147)
would be best suited.
if you need to be more precise, then use the calculations on the page
immediately following the lens charts.
Screen width
10 20 30 40 50 60 70 80 metres
33 66 98 131 164 197 230 262 feet
Throw distance
66 20
49 15
33 10
16
5
2.35:1 (Scope),
1.85:1, 16:9,
1.66:1 (Vista) and 4:3
1.2 : 1 fixed lens
(1.2 - 2m)
107-143
0.73 : 1 fixed lens
107-141
1.2 : 1 fixed lens
(3 - 15m)
107-142
1.5 - 2.02 : 1
zoom lens
107-144
2.02 - 2.77 : 1
zoom lens
107-145
2.77 - 4.51 : 1
zoom lens
107-146
4.51 - 7.53 : 1
zoom lens
107-147
