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Digital Projection HIGHlite Laser 3D Series
Calculating the throw ratio with TRC
1.
For TRC > 1, amend the basic throw ratio formula as follows:
Throw distance
Throw ratio =
Screen width x TRC
2.
Once a throw ratio is established, identify the matching lens from the table:
Throw ratios
Throw distance range
0.77 : 1 fixed lens
1.3 - 2.5 m (4.3 - 8.2 ft)
1.16 : 1 fixed lens
1.4 - 6.2 m (4.6 - 20.3 ft)
1.45 - 1.74 : 1 zoom lens
1.8 - 9.3 m (5.9 - 30.5 ft)
1.74 - 2.17 : 1 zoom lens
2.2 - 11.8 m (7.2 - 38.7 ft)
2.17 - 2.90 : 1 zoom lens
2.7 - 15.4 m (8.9 - 50.5 ft)
2.90 - 4.34 : 1 zoom lens
3.6 - 22.5 m (11.8 - 73.8 ft)
4.34 - 6.76 : 1 zoom lens
5.5 - 35 m (18 - 114.8 ft)
3.
Ensure the required throw distance is within the range of the matching lens.
Reference Guide
CHOOSING A LENS
Notes
TRC can only be applied if greater
than 1. If TRC is 1 or less, disregard
it and calculate the throw ratio using
the basic formula.
Do not use the short lens hood
with the long throw lens.
For further information about using
the right lens and hood, see
The
lens hood
in the Installation and
Quick-Start Guide.
Rev C February 2015
page 81
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