Useful Lens Calculations; Lens Extension - Digital Projection TITAN sx+ 3D Dual 3D Ultra Contrast User Manual

Digital Projection
TITAN sx+ 3D, Dual 3D, Ultra Contrast

Useful lens calculations

The following lens calculations may be useful:
Throw ratio
Throw ratio factor (TRF)
Therefore:
Screen width
Throw distance

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.
0.73 : 1 fixed lens
1.2 : 1 (3 - 15m) fixed lens
1.2 : 1 (1.2 - 2.0m) fixed lens 105-609
1.26 - 1.61 : 1 zoom lens
1.5 - 2.02 : 1 zoom lens
2.02 - 2.77 : 1 zoom lens
2.77 - 4.51 : 1 zoom lens
4.51 - 7.53 : 1 zoom lens
7.5 - 11.2 : 1 zoom lens
Rev A August 2009
= Throw distance
Screen width
= DMD width in pixels =
image width in pixels
= Throw distance
Throw ratio x TRF
= Screen width x Throw ratio x TRF
High Brightness/ Contrast Lens extension (±2%)
105-607 107-195
105-608 105-608
105-609
109 236 109-359
105-610 107-196
105-611 107-197
105-612 107-198
105-613 107-199
109-235 109-358
User Manual
1400
image width in pixels
204 mm (8.0 in)
268 mm (10.6 in)
268 mm (10.6 in)
226 mm (8.9 in)
194 mm (7.6 in)
159 mm (6.3 in)
145 mm (5.7 in)
129 mm (5.1 in)
179 mm (7.0 in)
lens extension,
measured from front
of corner post
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.
Page 2.9