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Appendix
Projected image size
The image offset range for the standard lens is 10:1 (100%) to 1:1 (50%).
The image offset range for the short throw lens is 10:1 (100%) to 1:1 (50%).
The optimal offset setting for the fixed focus short throw lens is 50% (on
axis).
Table 1:
Image sizes for standard lens (1.5 - 2.2:1 lens throw)
Distance to
screen
(feet/m)
Minimum
Diagonal
(feet/m)
Maximum
Diagonal
(feet/m)
3/0.9 1.7/0.52 2.5/0.76
5/1.5 2.84/0.87 4.17/1.27
10/3.0 5.68/1.73 8.33/2.54
15/4.6 8.52/2.60 12.5/3.81
20/6.1 11.36/3.46 16.67/5.08
25/7.6 14.20/4.33 20.83/6.35
30/9.1 17.05/5.2 25.0/7.62
35/10.7 19.89/6.06 29.17/8.89
40/12.2 22.73/6.93 33.33/10.16
45.5/13.9 25.85/7.88 37.92/11.56
Table 2:
Image sizes for short throw lens (1.1 - 1.5:1)
Distance to
screen
(feet/m)
Minimum
Diagonal
(feet/m)
Maximum
Diagonal
(feet/m)
2/0.6 1.67/0.51 2.27/0.69
5/1.5 4.17/1.27 5.68/1.73
10/3.0 8.33/2.54 11.36/3.46
15/4.6 12.5/3.81 17.05/5.20
20/6.1 16.67/5.08 22.73/6.93
25/7.6 20.83/6.35 28.41/8.66
30.5/9.3 25.42/7.75 34.66/10.56
Table 3:
Image sizes for fixed focus short throw lens (0.8:1)
Distance to
screen
(feet/m)
Diagonal
(feet/m)
3/0.9 4.69/1.43
5/1.5 7.81/2.38
10/3 15.63/4.76
12/3.7 18.75/5.72
Table 2:
Image sizes for short throw lens (1.1 - 1.5:1)
Distance to
screen
(feet/m)
Minimum
Diagonal
(feet/m)
Maximum
Diagonal
(feet/m)