Calculating The Throw Ratio With Trc - Digital Projection HIGHlite Laser II 3D Series User Manual

Digital Projection HIGHlite Laser II 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
0.77 : 1 fixed lens
1.16 : 1 fixed lens
1.45 - 1.74 : 1 zoom lens
1.74 - 2.17 : 1 zoom lens
2.17 - 2.90 : 1 zoom lens
2.90 - 4.34 : 1 zoom lens
4.34 - 6.76 : 1 zoom lens
3. Ensure the required throw distance is within the range of the matching lens.
Reference Guide
Throw distance range
1.3 - 15 m (4.3 - 49.2 ft)
1.4 - 25 m (4.6 - 82 ft)
1.8 - 9.3 m (5.9 - 30.5 ft)
2.2 - 11.8 m (7.2 - 38.7 ft)
2.7 - 15.4 m (8.9 - 50.5 ft)
3.6 - 22.5 m (11.8 - 73.8 ft)
5.5 - 35 m (18 - 114.8 ft)
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 4.34 - 6.76 : 1 zoom lens.
For further information about using
The
the right lens and hood, see
lens hood in the Installation and
Quick-Start Guide.
Rev B December 2016
page 87