Epson 7850p - PowerLite XGA LCD Projector Manuel d'information sur les produits - Page 4

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Epson 7850p - PowerLite XGA LCD Projector Manuel d'information sur les produits

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.

7 to 9.5 ft

27 to 36.1 ft

❏ 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

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.

2.6 to 3.5 ft

Distance

from screen

Keystone

EPSON PowerLite 7850p Projector

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)

❏ Minimum diagonal size =

((2.54 × projection distance) / 100) × 26.84)

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)

Minimum diagonal size =

((2.54 × projection distance) / 100) × 20.48)

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)

❏ Minimum diagonal size =

((2.54 × projection distance) / 100) × 15.23)

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

2.13

1.29

1.49

1.1

1.93

1.45