Page 2.12
105-453B January 2007
2. Installation
Digital Projection
LIGHTNING 35HD-T, 40HD-T
User Manual
Lens charts continued
4:3 un-resized image (TRF = 2.0)
Use the chart below to choose which lens best suits your application.
if you need to be more precise, then use the calculations on the page immediately
following the lens charts.
Notes
This chart has a TRF of 2.0, for
use with the following images:
1024 x 768
pixels
10 20 30 40 metres
33 66 98 131 feet
Throw distance
131 40
98 30
66 20
33 10
feet
metres
Screen width
1.0: 1
fi
xed
lens
103-350
1.25 - 1.45: 1
zoom lens
103-351
1.45 - 1.8: 1
zoom lens
102-451
1.8 - 2.4: 1
zoom lens
102-676
3.0 - 4.3: 1
zoom lens
102-678
4.3 - 6.0: 1
zoom lens
104-189
2.2 - 3.0: 1
zoom lens
102-677
(note: these two lenses overlap)