Chapter 2
Getting Started — Setting up
ENGLISH - 39
(Unit: m)
Projection lens Model No.
Lens protrusion dimension (L1) (approximate value)
Standard zoom lens/
ET-DLE170
0.043
ET-DLE020
0.266
ET-DLE055
0.027
ET-DLE060
0.104
ET-DLE085
0.084
ET-DLE105
0.088
ET-DLE150
0.044
ET-DLE250
0.045
ET-DLE350
0.051
ET-DLE450
0.095
Note
f
For the adjustment range of the projected image position with the lens shift, refer to “Lens shift range” (
x
page 73).
r
Fixed-focus Lens (Model No.: ET-DLE035)
SH
A1
L3
L4
A2
L1
L2
SD
SH
SW
SW
Projected image
Screen
Screen
Note
f
This illustration is prepared on the assumption that the projected image size and position have been aligned to fit full in the screen.
SH
Projected image height
SW
Projected image width
SD
Projected image size
L1
*1
Projection distance (distance from the mirror reflection surface
*2
to the screen)
L2
Distance from the front end of the projection lens to the screen
L3
Distance from the front surface of the projector to the screen
L4
Distance from the back surface of the projector to the screen
A1
*1
Distance from the top surface of the projector to the bottom edge of the screen
A2
Distance from the installation surface of the projector to the screen (adjustable feet at lowest position)
*1
For details about calculating the projection distance, refer to “Formula for calculating the projection distance per projection lens” (
x
page 46).
*2
The mirror reflection surface cannot be seen from the outside because it is located inside the Fixed-focus Lens.
(Unit: m)
Distance from the projector
to the screen
Formula
L2
= L1 + 0.023
L3
= L1 - 0.166
L4
= L1 - 0.704
A2
= A1 + 0.200
