Appendix; Projected Image Size - InFocus LP 840/LP 850 User Manual

Appendix

Projected image size

NOTE: Visit our website for an interactive image size calculator.
Table 1: Projection sizes: Standard lens (1.5 - 2.2:1 throw ratio)
Minimum Image
Diagonal
Distance Image
(feet/m) (feet/m)
Min Distance 1.7/0.52
3/0.9
5/1.5 2.84/0.87
10/3.0 5.68/1.73
20/6.1 11.36/3.46
30/9.1 17.05/5.2
40/12.2 22.73/6.93
Max Distance 25.85/7.88
45.5/13.9
The image offset range for the standard lens is 10:1 (100%) to 1:1 (50%).
Maximum Image
Image Diagonal Image
Width Image Width
(feet/m) (feet/m) (feet/m)
1.46/.42 2.5/0.76 1.82/0.55
2.27/.69 4.17/1.27 4.55/1.39
4,55/1.39 8.33/2.54 9.09/2.77
9.09/2.77 16.67/5.08 13.33/4.06
13.64/4.16 25.0/7.62 20.0/6.10
18.18/5.54 33.33/10.16 26.67/8.13
20.68/6.20 37.92/11.56 30.33/9.25
Table 2: Projection sizes: Short Fixed lens (0.8:1 throw ratio)
Distance (feet/m)
Min Distance
3/0.9
5/1.5
10/3.0
Max Distance 12/3.7
The optimal offset setting for the fixed focus short throw lens is 50% (on
axis).
43
Image Size
Diagonal Image Image Width
(feet/m) (feet/m)
4.69/1.43 3.75/1.14
7.81/2.38 6.25/1.91
15.63/4.76 12.5/3.81
18.75/5.72 15.0/4.57