BenQ MX518 User Manual - Page 16

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 Refer to "Dimensions" on page 69 for the center of lens dimensions of this projector before calculating the appropriate position. Maximum zoom Minimum zoom Screen H H Diagonal Diagonal Center of lens W W Vertical offset Projection distance MS517/MX518/MS517F/MX518F The screen aspect ratio is 4:3 and the projected picture is 4:3 Screen size Projection distance (mm) Diagonal WH Min Average Max (mm) (mm) distance distance Inch mm (max. (min. zoom) zoom) 30 762 610 457 1200 1260 1320 40 1016 813 610 1600 1680 1760 50 1270 1016 762 2000 2100 2200 60 1524 1219 914 2400 2520 2640 80 2032 1626 1219 3200 3360 3520 100 2540 2032 1524 4000 4200 4400 120 3048 2438 1829 4800 5040 5280 150 3810 3048 2286 6000 6300 6600 200 5080 4064 3048 8000 8400 8800 220 5588 4470 3353 8800 9240 9680 250 6350 5080 3810 10000 10500 11000 300 7620 6096 4572 12000 12600 13200 Vertical offset (mm) 69 91 114 137 183 229 274 343 457 503 572 686 For example, if you are using a 120-inch screen, the average projection distance is 5040 mm and with a vertical offset of 274 mm. If your measured projection distance is 5.0 m (5000 mm), the closest match in the "Projection distance (mm)" column is 5040 mm. Looking across this row shows that a 120'' (about 3.0 m) screen is required. 16 Positioning your projector