Choosing A Lens Using The Lens Charts; Full Width Images - Digital Projection LIGHTNING 30sx+c User Manual

2. Installation

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 8m at a distance of 25m, the 2.55 - 4.54: 1 zoom lens
would be best suited.
•
For the same screen size at a distance of 40m, the 4.54 - 7.27: 1 lens would be
best suited.
if you need to be more precise, then use the calculations on the page
immediately following the lens charts.
49 15
33 10
16
0.73 : 1 fi xed lens
105-863
Page 2.6
Digital Projection
1.45 - 1.82 : 1
zoom lens
105-834
5
10
33
LIGHTNING 30sx+c, 40sx+c
1.82 - 2.55 : 1
2.55 - 4.54 : 1
zoom lens
zoom lens
105-835
20 30
66 98
Throw distance
Notes
This chart has a TRF of 1.0, for
use with the following images:
2.35:1 (Scope),
1.85:1, 16:9,
1.66:1 (Vista) and 4:3
4.54 - 7.27 : 1
zoom lens
105-836 105-864
40
131
105-941A January 2007
User Manual
50 metres
164 feet