IBM iL2120 User Manual page 56

Table 2. Image size, width and height-maximum image size
Distance to screen (feet) Diagonal (feet)
4.9
8
12
16
20
30
46
iL2120 IBM Value Data/Video Projector, iL2220 Conference Room Data/Video Projector: User's Guide
2.5
4.0
6.0
8.0
10.0
15.0
Width (feet)
2.0
3.2
4.8
6.4
8.0
12.0
Height (feet)
1.5
2.4
3.6
4.8
6.0
9.0