NEC VT491 VT491/590/595 IG - Page 2

VT491/590/595 Installation Guide Ceiling Mounted and Desktop NEC Display Solutions of America, Inc. Rev 1.3 Diagrams and Distance Charts The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation. Distances are in inches. For millimeters multiply by 25.4. Ceiling Mounted D Lens Ctr Screen Top C Throw Distance 5.68" 5.26" B Screen Ctr Lens Offset From Mount Pipe Desktop 3.27" Screen Ctr B Lens Ctr D Screen Bottom C Throw Distance 2.57" Distance Chart for popular 4:3 screens Note: For screen sizes not indicated on the projection tables, use the formulas on page 1. Screen Size (4:3) Diag W H inches inches inches 30 24 18 60 48 36 72 57.6 43.2 84 67.2 50.4 90 72 54 100 80 60 120 96 72 150 120 90 180 144 108 200 160 120 250 200 150 300 240 180 B inches 6 13 15 18 19 21 26 32 38 43 53 64 C wide - tele inches 35 - 43 72 - 87 87 - 104 101 - 122 109 - 130 121 - 145 145 - 174 182 - 218 218 - 262 243 - 291 304 - 364 365 - 438 D inches -3 -5 -6 -7 -8 -9 -10 -13 -16 -17 -22 -26 α wide - tele degrees 10.2 - 8.5 10.1 - 8.4 10.0 - 8.4 10.0 - 8.4 10.0 - 8.4 10.0 - 8.3 10.0 - 8.3 10.0 - 8.3 10.0 - 8.3 10.0 - 8.3 9.9 - 8.3 9.9 - 8.3 www.necdisplay.com VT491/590/595 Page 2 of 6