Rev D July 2014
Page 2.11
Digital Projection
HIGHlite Cine 260, 1080p 330
User Manual
2. Installation
Notes
The Throw ratio for a particular
lens is fixed, but assumes that
the image fills the width of the
DMD.
For images that do not fill the
width of the DMD, the Throw
ratio is effectively increased.
To correct for this in these
calculations, a Throw Ratio
Factor (TRF) is used.
ONLY the High Brightness
lenses are recommended for
the 1080p 330.
Choosing a lens by calculation
For any screen size not listed above, or if you need to be more precise, then use the
calculations below.
•
Identify actual width of the image in pixels.
•
Calculate the Throw Ratio Factor:
TRF = DMD width (1920)
Image width in pixels
•
Identify the screen width required.
•
Identify the throw distance required.
Throw distance calculations are based on the distance from the outer end of the
lens, which will vary from lens to lens. Once a lens has been chosen, the figures
can be checked using the lens extension values given below.
•
Calculate the throw ratio required.
Throw ratio =
Throw distance
Screen width x TRF
•
Choose a lens with the required throw ratio from the list at the bottom of the
page.
Check from the list that the lens chosen will work at the throw distance required.
Example
•
An image, 1024 x 768 pixels, screen width 3.0m, throw distance 17m from the
outer end of the lens.
•
Throw Ratio Factor (TRF) =
1920
= 1.875
1024
•
Throw ratio required = 17
= 3.02
3.0 x 1.875
•
Choose the 2.9 - 4.34 : 1 zoom lens.
High Brightness High Contrast Extension
Throw distance range
0.77 : 1 fixed lens
110-808
110-022
80 mm (3.2 in) 1.3 - 2.5m (4.3 - 8.2ft)
1.16 : 1 fixed lens
110-809
110-023
54 mm (2.1 in) 1.4 - 6.2m (4.6 - 20.3ft)
1.45 - 1.74 : 1 zoom lens
110-803
110-017
24 mm (1.0 in) Wide: 1.8 - 7.6m (5.9 - 24.9ft)
Tele: 2.2 - 9.3m (7.2 - 30.5ft)
1.74 - 2.17: 1 zoom lens
110-804
110-018
n/a
Wide: 2.2 - 9.5m (7.2 - 31.2ft)
Tele: 2.7 - 11.8m (8.9 - 38.7ft)
2.17 - 2.9: 1 zoom lens
110-805
110-019
n/a
Wide: 2.7 - 11.5m (8.9 - 37.7ft)
Tele: 3.7 - 15.4m (12.1 - 50.5ft)
2.9 - 4.34: 1 zoom lens
110-806
110-020
n/a
Wide: 3.6 - 14.7m (11.8 - 48.2ft)
Tele: 5.5 - 22.5m (18 - 73.8ft)
4.34 - 6.76: 1 zoom lens
110-807
110-021
n/a
Wide: 5.5 - 22m (18 - 72.2ft)
Tele: 8.6 - 35m (28.2 - 114.8ft)
