BenQ BenQ MW612ST Short-Throw Wireless Projector MX613ST User Manual - Page 14

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. For example, if you are using a 120-inch screen, the recommended projection distance is 2422 mm and the vertical offset is 91 mm. If your measured projection distance is 3.0 m (3000 mm), the closest match in the "Distance from screen (mm)" column is 3028 mm. Looking across this row shows that a 150'' (about 3.8 m) screen is required. Projection dimensions Refer to "Dimensions" on page 62 for the center of lens dimensions of this projector before calculating the appropriate position. Maximum zoom Minimum zoom Screen Center of lens Vertical offset Projection distance Screen size Diagonal Inch mm W (mm) H (mm) 40 1016 813 50 1270 1016 60 1524 1219 80 2032 1626 100 2540 2032 120 3048 2438 150 3810 3048 200 5080 4064 220 5588 4470 250 6350 5080 300 7620 6096 610 762 914 1219 1524 1829 2286 3048 3353 3810 4572 Distance from screen (mm) Min length (max. zoom) Average Max length (min. zoom) 734 807 881 917 1009 1101 1101 1211 1321 1468 1615 1761 1835 2018 2202 2202 2422 2642 2752 3028 3303 3670 4037 4404 4037 4440 4844 4587 5046 5505 5505 6055 6606 Vertical offset (mm) 30 38 46 61 76 91 114 152 168 191 229 There is 3% tolerance among these numbers due to optical component variations. BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location. 14 Positioning your projector