Acer X1211 User Manual - Page 23
Remind as below the space of 262 cm height is, sizes between 137 and 164.
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English 13 • X1211S If the projector is 3 m from the screen, good image quality is possible for image sizes between 137" and 164". Note: Remind as below figure, the space of 262 cm height is required when located at 3 m distance. Max screen size Min screen size 164" 137" Height: 219 cm Height: 262 cm From base to top of image 3 m Desired distance Minimum Screen Size (Min zoom) Desired Distance (m) < A > Diagonal (inch) W (cm) x H (cm) < B > From base to top of image (cm) < C > 1 46 93 x 69 74 1.5 68 139 x 104 109 2 91 185 x 139 146 2.5 114 231 x 174 182 3 137 278 x 208 219 3.5 159 324 x 243 254 4 182 370 x 278 291 4.5 205 417 x 313 328 5 228 463 x 347 365 6 273 556 x 417 437 Zoom Ratio: 1.2 x Maximum Screen Size (Max zoom) Diagonal (inch) < B > W (cm) x H (cm) From base to top of image (cm) < C > 55 111 x 83 88 82 167 x 125 131 109 222 x 167 174 137 278 x 208 219 164 333 x 250 262 191 389 x 292 306 219 444 x 333 350 246 500 x 375 394 273 556 x 417 437 328 667 x 500 525