Rev C April 2011
Page 2.9
Digital Projection
TITAN sx+ 3D, Dual 3D, Ultra Contrast
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, a Throw Ratio
Factor (TRF) is used.
Useful lens calculations
The following lens calculations may be useful:
Throw ratio
=
Throw distance
Screen width
Throw ratio factor (TRF)
=
DMD width in pixels =
1400
image width in pixels
image width in pixels
Therefore:
Screen width
=
Throw distance
Throw ratio x TRF
Throw distance
=
Screen width x Throw ratio x TRF
Lens extension
The throw distance calculated above is to the outer end of the lens. For each lens,
the nominal distance between the front of the projector and the outer end of the lens
(lens extension) will be as listed below.
High Brightness/ Contrast Lens extension (±2%)
0.73 : 1 fixed lens
105-607
107-195
204 mm (8.0 in)
1.2 : 1 (3 - 15m) fixed lens
105-608
105-608
268 mm (10.6 in)
1.2 : 1 (1.2 - 2.0m) fixed lens 105-609
105-609
268 mm (10.6 in)
1.26 - 1.61 : 1 zoom lens
109 236
109-359
226 mm (8.9 in)
1.5 - 2.02 : 1 zoom lens
105-610
107-196
194 mm (7.6 in)
2.02 - 2.77 : 1 zoom lens
105-611
107-197
159 mm (6.3 in)
2.77 - 4.51 : 1 zoom lens
105-612
107-198
145 mm (5.7 in)
4.51 - 7.53 : 1 zoom lens
105-613
107-199
129 mm (5.1 in)
7.5 - 11.2 : 1 zoom lens
109-235
109-358
179 mm (7.0 in)
lens extension,
measured from front
of corner post
