Calculating The Throw Ratio With Trc - Digital Projection M-Vision 930 Series User Manual

Digital Projection
M-Vision 930 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
0.84 - 1.03 : 1 zoom lens 1.5 - 4 m (4.9 - 13.1 ft)
1.56 - 1.86 : 1 zoom lens 2 - 7 m (6.6 - 23 ft)
1.85 - 2.40 : 1 zoom lens 2.5 - 10 m (8.2 - 32.8 ft)
2.40 - 4.00 : 1 zoom lens 4 - 12 m (13.1 - 39.4 ft)
3. Ensure the required throw distance is within the range of the matching lens.
Rev A January 2014
CHOOSING A LENS Reference Guide
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.
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