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