Epson 7850p Product Information Guide - Page 4

EPSON PowerLite 7850p Projector Positioning the Projector Follow these guidelines: ❏ Place the projector on a sturdy, level surface, between 2.6 and 36 feet from the screen. Image size generally increases with distance, but may vary depending on the position of the zoom ring and other settings. 27 to 36.1 ft 7 to 9.5 ft 2.6 to 3.5 ft Distance from screen ❏ Place it within 10 feet of an electrical outlet or extension cord and 5 feet of your computer or video source. ❏ Allow space for ventilation around and under the projector. ❏ To avoid a keystone shaped image (an image that is wider on one side), place the projector directly in front of the center of the screen, facing the screen squarely. ❏ If possible, place the projector level with the bottom of the screen. If you place the projector too far below the screen, you may have to tilt it up by extending the front adjustable foot (see page 7). This causes the projected image to lose its shape, but the projector automatically compensates. If the image is still not square, adjust it manually by pressing the Keystone buttons (see page 7) or using Quick Corner (see page 8). If you place the projector higher than the bottom of the screen, the image will be square, but it won't fill the screen. Calculating Image Size and Projection Distance Use the formulas below to find out how large the image will be when you know the distance from projector to screen, or to find out how far from the screen to place the projector if you want an image of a certain size. Since you can change the image size by rotating the zoom ring, formulas are given for calculating both minimum and maximum sizes. Note: Formulas given here apply only when the image is not tilted. If you tilt the image up by extending the projector's foot or using electronic keystone correction, your image size may vary. Standard Lens To determine the diagonal size of an image (in inches) when you know the projection distance: ❏ Maximum diagonal size = ((2.54 × projection distance) / 100) × 36) + 2.13 ❏ Minimum diagonal size = ((2.54 × projection distance) / 100) × 26.84) + 1.29 To determine the projection distance (in inches) when you know the diagonal size of the screen image: ❏ Maximum projection distance = ((diagonal size - 1.29) / 26.84) × 100 / 2.54 ❏ Minimum projection distance = ((diagonal size - 2.13) / 36) × 100 / 2.54 Middle Throw Lens (V12H004M03) To determine the diagonal size of an image (in inches) when you know the projection distance: ❏ Maximum diagonal size = ((2.54 × projection distance ) / 100) × 27.42) + 1.49 Minimum diagonal size = ((2.54 × projection distance) / 100) × 20.48) + 1.1 To determine the projection distance (in inches) when you know the diagonal size of the screen image: ❏ Maximum projection distance = ((diagonal size - 1.1) / 20.48) × 100 / 2.54 ❏ Minimum projection distance = ((diagonal size - 1.49) / 27.42) × 100 / 2.54 Long Throw Zoom Lens (V12H004L05) To determine the diagonal size of an image (in inches) when you know the projection distance: ❏ Maximum diagonal size = ((2.54 × projection distance) / 100) × 20.4) + 1.93 ❏ Minimum diagonal size = ((2.54 × projection distance) / 100) × 15.23) + 1.45 To determine the projection distance (in inches) when you know the diagonal size of the screen image: ❏ Maximum projection distance = ((diagonal size - 1.45) / 15.23) × 100 / 2.54 ❏ Minimum projection distance = ((diagonal size - 1.93) / 20.54) × 100 / 2.54 6/03 EPSON PowerLite 7850p Projector - 3