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ENGLISH-23
Preparation
22-ENGLISH
Setting-up
Projection methods
The projector can be set up so that any one of the following four projection
methods are used. Select whichever projection method matches the setting-
up method. (The projection method can be set from the OPTION2 menu.
Refer to page 37 for details.)
FRONT/REAR
FRONT
REAR
(Factory default setting)
NOTE:
BYou will need to purchase the separate ceiling bracket (ET-PKC75) when
using the ceiling installation method.
Projector position
DESK/CEILING
DESK CEILING
H1
L
L
SH
SW
TEMP
LAMP
RGB INPUT
INPUTAUTO SETUP
POWER
STANDBY(R)
ON(G)
MENU ENTER
57 mm
(2-
7
/32˝)
L: Projection distance
SH: Image height
SW:Image width
H1: Distance from centre
of lens to bottom edge
of projected image
Top edge of screen
Screen
Bottom edge of screen
Screen
Projection distances
Setting-up dimensions which are not given in the above table can be
calculated using the formulas below.
If the screen size (diagonal) is SD (m), then the following formula is used to
calculate the projection distance for the wide lens position (LW) and the
projection distance for the telephoto lens position (LT).
For 16:9 aspect ratios, the following formula can be used to calculate the
projection distance.
NOTE:
BThe dimensions in the table above and the values obtained from the
above formulas may contain slight errors.
BIf you use the projection distance for the 16:9
screen, the 4:3 projection image overflows the
screen at the top and bottom.
0.84 m(33˝) 1.1 m(3´7˝) 1.1 m(3´7˝) 0.08 m(3-1/8˝)
1.02 m(40˝) 1.2 m(3´11˝) 1.4 m(4´7˝) 1.2 m(3´11˝) 1.4 m(4´7˝) 0.09 m(3-17/32˝)
1.27 m(50˝) 1.5 m(4´11˝) 1.7 m(5´6˝) 1.5 m(4´11˝) 1.8 m(5´10˝) 0.11 m(4-5/16˝)
1.52 m(60˝) 1.8 m(5´10˝) 2.1 m(6´10˝) 1.8 m(5´10˝) 2.1 m(6´10˝) 0.14 m(5-1/2˝)
1.78 m(70˝) 2.1 m(6´10˝) 2.4 m(7´10˝) 2.1 m(6´10˝) 2.5 m(8´2˝) 0.16 m(6-9/32˝)
2.03 m(80˝) 2.4 m(7´10˝) 2.8 m(9´2˝) 2.4 m(7´10˝) 2.9 m(9´6˝) 0.18 m(7-1/16˝)
2.29 m(90˝) 2.7 m(8´10˝) 3.2 m(10´5˝) 2.8 m(9´2˝) 3.2 m(10´5˝) 0.20 m(7-27/32˝)
2.54 m(100˝) 3.0 m(9´10˝) 3.5 m(11´5˝) 3.0 m(9´10˝) 3.6 m(11´9˝) 0.22 m(8-21/32˝)
3.05 m(120˝) 3.6 m(11´9˝) 4.2 m(13´9˝) 3.7 m(12´1˝) 4.3 m(14´1˝) 0.26 m(10-7/32˝)
3.81 m(150˝) 4.5 m(14´9˝) 5.3 m(17´4˝) 4.6 m(15´1˝) 5.4 m(17´8˝) 0.33 m
(12-31/32˝)
5.08 m(200˝) 6.0 m(19´8˝) 7.1 m(23´3˝) 6.1 m(20´) 7.3 m(23´11˝) 0.44 m(17-5/16˝)
6.35 m(250˝) 7.5 m(24´7˝) 8.9 m(29´2˝) 7.6 m(24´11˝) 9.1 m(29´10˝) 0.55 m(21-5/8˝)
7.62 m(300˝) 9.0 m(29´6˝) 10.7 m(35´1˝) 9.2 m(30´2˝) 11.0 m(36´1˝) 0.66 m
(25-31/32˝)
Wide
(LW)
Telephoto
(LT)
Projection distance (L)
PT-LC75E PT-LC55E
Height
position
(H1)
Wide
(LW)
Telephoto
(LT)
4:3 Screen
size
(diagonal)
PT-LC75E PT-LC55E
LW=0.030xSD/0.0254-0.037 LW=0.031xSD/0.0254-0.038
LT=0.036xSD/0.0254-0.037 LT=0.037xSD/0.0254-0.038
PT-LC75E PT-LC55E
LW=0.032xSD/0.0254-0.037 LW=0.033xSD/0.0254-0.038
LT=0.039xSD/0.0254-0.037 LT=0.040xSD/0.0254-0.038