BenQ TH685 User Manual - Page 12

Obtaining a preferred projected image size The distance from the projector lens to the screen, the zoom setting (if available), and the video format each factors in the projected image size. Projection dimensions 16:9 Screen diagonal H Screen Center of lens W Projection distance • The screen aspect ratio is 16:9 and the projected picture is in a 16:9 aspect ratio Screen size Diagonal Inch mm H (mm) 30 762 374 W (mm) 664 Projection Distance (mm) Min distance (with max zoom) Average Max distance (with min zoom) 748 859 970 40 1016 498 886 998 1145 1293 50 1270 623 1107 1247 1432 1616 60 1524 747 1328 1497 1718 1939 70 1778 872 1550 1746 2004 2263 80 2032 996 1771 1996 2291 2586 90 2286 1121 1992 2245 2577 2909 100 2540 1245 2214 2495 2864 3232 110 2794 1370 2435 2744 3150 3555 120 3048 1494 2657 2994 3436 3879 130 3302 1619 2878 3243 3723 4202 140 3556 1743 3099 3493 4009 4525 150 3810 1868 3321 3742 4295 4848 160 4064 1992 3542 3992 4582 5171 170 4318 2117 3763 4241 4868 5495 180 4572 2241 3985 4491 5154 5818 190 4826 2366 4206 4740 5441 6141 200 5080 2491 4428 4990 5727 6464 210 5334 2615 4649 5239 6013 6788 220 5588 2740 4870 5489 6300 7111 230 5842 2864 5092 5738 6586 7434 240 6096 2989 5313 5988 6873 7757 250 6350 3113 5535 6237 7159 8080 260 6604 3238 5756 6487 7445 8404 270 6858 3362 5977 6736 7732 8727 280 7112 3487 6199 6986 8018 9050 290 7366 3611 6420 7235 8304 9373 300 7620 3736 6641 7485 8591 9696 Offset (mm) 19 25 31 37 44 50 56 62 68 75 81 87 93 100 106 112 118 125 131 137 143 149 156 162 168 174 181 187 12 Positioning your projector