page 89
Digital Projection E-Vision Laser 4K Series
Reference Guide
CHOOSING A LENS
Rev A June 2017
Calculating TRC
To calculate TRC, use the following formula:
1.6 (DMD™ aspect ratio)
Source aspect ratio
TRC =
TRC table
Alternatively, you can save time by referencing the following table, which shows the TRC value for some popular image formats:
2.35:1 (Scope),
1920 x 817 pixels
TRC < 1, not used
1.85:1 (Flat),
1920 x 1037 pixels
TRC < 1, not used
1.78:1 (16:9),
1920 x 1080
TRC < 1, not used
1.66:1 (Vista),
1792 x 1080 pixels
TRC < 1, not used
1.6:1 (16:10),
1728 x 1080 pixels
TRC = 1, not used (native resolution)
1.33:1 (4:3),
1440 x 1080 pixels
TRC = 1.2
1.25:1 (5:4),
1350 x 1080 pixels
TRC = 1.28
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.
