NEC Display Solutions of America, Inc.NP901W Installation GuideCeiling Mounted and Desktop Rev 1.0www.necdisplay.com NP901W Page 5 of 6Projection Distance and Screen Size for Ceiling Mount and DesktopThe following shows the proper relative positions of the projector and screen. Refer to the table to determine the position ofinstallation.Distances are in inches. For millimeters multiply by 25.4.Ceiling Mount InstallationRear Projection Desktop InstallationBCLens CtrScreen CtrThrow DistanceScreen Bottom 2.85"BCLens CtrScreen CtrThrow DistanceScreen Top5.63"6.01"Lens Offset FromMount PipeDD3.74Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.