BenQ TK800M User Manual - Page 12

Obtaining a preferred projected image size The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the projected image size. Projection dimensions • The screen aspect ratio is 16:9 and the projected picture is in a 16:9 aspect ratio 16:9 Screen diagonal Screen H Center of lens W Vertical offset Projection distance Screen size Distance from screen (mm) Diagonal Inch mm Min length H (mm) W (mm) (max. zoom) Average Max length Vertical offset (mm) (min. zoom) 30 762 374 664 996 1046 1096 37 40 1016 498 886 1328 1395 1461 50 50 1270 623 1107 1660 1743 1826 62 60 1524 747 1328 1992 2092 2192 75 70 1778 872 1550 2324 2441 2557 87 80 2032 996 1771 2657 2789 2922 100 90 2286 1121 1992 2989 3138 3287 112 100 2540 1245 2214 3321 3487 3653 125 110 2794 1370 2435 3653 3835 4018 137 120 3048 1494 2657 3985 4184 4383 149 130 3302 1619 2878 4317 4533 4749 162 140 3556 1743 3099 4649 4881 5114 174 150 3810 1868 3321 4981 5230 5479 187 160 4064 1992 3542 5313 5579 5844 199 170 4318 2117 3763 5645 5927 6210 212 180 4572 2241 3985 5977 6276 6575 224 190 4826 2366 4206 6309 6625 6940 237 200 5080 2491 4428 6641 6973 7306 249 210 5334 2615 4649 6973 7322 7671 262 220 5588 2740 4870 7306 7671 8036 274 230 5842 2864 5092 7638 8019 8401 286 240 6096 2989 5313 7970 8368 8767 299 250 6350 3113 5535 8302 8717 9132 311 260 6604 3238 5756 8634 9066 9497 324 270 6858 3362 5977 8966 9414 9862 336 280 7112 3487 6199 9298 9763 10228 349 290 7366 3611 6420 9630 10112 10593 361 300 7620 3736 6641 9962 10460 10958 374 For example, if you are using a 120-inch screen, the recommended projection distance is 4184 mm. If your measured projection distance is 520 cm, the closest match in the "Distance from screen (mm)" column is 5230 mm. Looking across this row shows that a 150'' (about 3.81 m) screen is required. 12 Positioning your projector