NEC MultiSync LT245 Installation Manual page 3

Diagrams and Distance Charts for 16:9 Screens
The following diagram shows the relationship between projector position and the screen. Refer to the chart below for data.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling
Mounted
Lens Ctr
Screen Ctr
Desktop
Screen Ctr
Lens Ctr
Distance chart for popular 16:9 screens
Vertical Position for a 16:9 screen
The Vertical Position adjustment moves the 16:9
image up and down in the unused portion of the
4:3 panel. This adjustment is only available when
the projector is set for '16:9' in the 'Screen' menu.
The range of Vertical Position is dependent on
aspect ratio and 3D Reform used. If 3D Reform
is not used, the approximate range of Vertical
Position is +/-0.167H (H=Screen Height) when
using a 16:9 screen.
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.
www.necvisualsystems.com
D
Screen Top
B
B
Screen Bottom
D
Screen Size (16:9)
Diag
inches inches inches
28
55
60
73
82.6
92
100
106
110
119
123
133
135
159.5
161
459
C
Throw Distance
C
Throw Distance
3.3"
B
W H wide - tele
inches
inches
24 13.5 12.5 35.7 - 43.3
48 27 25.1 73.3 - 88.5
53 29.5 27.5 80.4 - 97.0
64 36 33.5 98.5 - 118.7
72 40.5 37.7 111.0 - 133.7
80 45 41.9 123.6 - 148.8
87 49 45.6 134.5 - 162.0
92 52 48.2 142.4 - 171.4
96 54 50.3 148.7 - 178.9
104 58.5 54.5 161.2 - 194.0
107 60 56.1 165.9 - 199.6
116 65 60.8 180.0 - 216.6
118 66 61.9 183.2 - 220.4
139 78 72.9 216.1 - 259.9
140 79 73.4 217.7 - 261.8
400 225 209.9 625.7 - 751.5
6.5"
5.8"
α
Lens offset from
mount center
2.5"
α
α
C
D
wide - tele
degrees
inches
5.8 19.4 - 16.2
11.6 18.9 - 15.9
12.7 18.9 - 15.8
15.5 18.8 - 15.8
17.5 18.8 - 15.8
19.4 18.7 - 15.7
21.1 18.7 - 15.7
22.4 18.7 - 15.7
23.3 18.7 - 15.7
25.3 18.7 - 15.7
26.0 18.7 - 15.7
28.2 18.7 - 15.7
28.7 18.7 - 15.7
33.8 18.6 - 15.7
34.0 18.6 - 15.7
97.4 18.5 - 15.6
LT245 Page 3 of 7