BenQ GV31 User Manual - Page 25
Obtaining a preferred image size, Projection dimensions
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Obtaining a preferred 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 W Vertical Offset Center of lens Distance from Screen Screen size Inch mm 30 762 W (mm) H (mm) Distance from screen (mm) 664 374 797 40 1016 886 498 1063 50 1270 1107 623 1328 60 1524 1328 747 1594 70 1778 1550 872 1860 80 2032 1771 996 2125 90 2286 1992 1121 2391 100 2540 2214 1245 2657 110 2794 2435 1370 2922 120 3048 2657 1494 3188 For example, if you are using a 100-inch screen, the recommended projection distance is 2657 mm. If your measured projection distance is 2391 mm, the projected screen size is 90-inch. 23
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