Epson 7850p Produktdatenblatt

EPSON PowerLite 7850p Projector

6/03

EPSON PowerLite 7850p Projector 

- 

3

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.

❏ 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.

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.

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

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

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

2.6 to 3.5 ft

7 to 9.5 ft

27 to 36.1 ft

Distance 
from screen