Dell Mobile Projector M900HD - Manual (Page 17)

Adjusting Projection Image Size
80" (203.2 cm)
70" (177.8 cm)
60" (152.4 cm)
50" (127.0 cm)
40" (101.6 cm)
30" (76.2 cm)
7.87' (2.4 m) 6.89' (2.1 m) 5.9' (1.8 m) 4.95' (1.51 m) 3.97' (1.21 m)
2.98' (0.91 m)
Projector to screen
distance
Using Your Projector 17