Epson 7800p - PowerLite XGA LCD Projector Manuel d'information sur les produits - Page 4

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Epson 7800p - PowerLite XGA LCD Projector Manuel d'information sur les produits

Positioning the Projector

Follow these guideline when deciding where to place the

projector:

Place the projector on a sturdy, level surface.

Make sure there is plenty of space for ventilation around

and under the projector. Do not set it on top of anything

that could block the vents under the projector.

Make sure the projector is within 10 feet of a grounded

electrical outlet or extension cord.

Image size increases with distance, but varies depending on

how you've adjusted the optical zoom and other settings.

27 to 36.5 ft

5.3 to 7.2ft

It's best to place the projector directly in front of the center of

the screen, facing the screen squarely. If it isn't placed this

way, the image will be "keystone" shaped, instead of

rectangular.

Screen

Overhead View

If you place the projector below screen level, you'll have to tilt

it up by extending the front adjustable foot. This also causes

the image to lose its rectangular shape. To correct distortion,

see "Adjusting the Image Shape" on page 8.

Calculating Image Size and Projection

Distance

Use the formulas below either to find out how large your

image will be when you know the distance from the projector

to the screen, or to find out how far from the screen to place

the projector if you want an image of a certain size. Since the

size of the image can be changed by rotating the zoom ring,

formulas are given for calculating both the minimum and

maximum sizes.

TBD

2.5 to 3.5 ft

approx. distance

from 60" screen

Projector

EPSON PowerLite 7800p Projector

Note: The formulas given here are for when the projector is placed

flat, without tilting it up at the screen. If you tilt it up by

extending the feet or use 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)

Minimum diagonal size =

(((2.54

projection distance) / 100)

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)

Minimum projection distance =

(((diagonal size – 2.13) / 36)

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)

Minimum diagonal size =

(((2.54

projection distance) / 100)

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)

Minimum projection distance =

(((diagonal size – 1.49) / 27.42)

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)

Minimum diagonal size =

(((2.54

projection distance) / 100)

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)

Minimum projection distance =

(((diagonal size – 1.93) / 20.54)

5/03

EPSON PowerLite 7800p Projector

36)

2.13

26.84)

1.29

100 / 2.54

27.42)

1.49

20.48)

1.1

100 / 2.54

20.4)

1.93

15.23)

1.45

100 / 2.54