Features:

Projector                                                                           Throw Ratio
Christie HD405                                                                    0.74:1
Christie's 1-chip DLP® SXGA+ Projectors                                 0.8:1
Christie DW30                                                                     0.88:1

Specifications:

SXGA+ Specifications
 0.8:1 throw ratio
 +/-12% vertical offset
 +/-7% horizontal offset
 20" - 114" (51cm - 289cm) minimum/maximum screen width

720 HD Specifications
 0.88:1 throw ratio
 +/-81% vertical offset
 +/-31% horizontal offset
 20" - 114" (51cm - 289cm) minimum/maximum screen width

Lens length
 8.65" (21.9cm)