Panasonic PT-L720U manual Setting-up, Projection methods, Projection distances, Projector position

Setting-up

Projection methods

In way of installing projector, 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 41 for details.)

DESK/CEILING
DESK	CEILING
FRONT
(Factory default setting)
FRONT/REAR
REAR

NOTE:

BYou will need to purchase the separate ceiling bracket (ET-PK730) when using the ceiling installation method.

Projection distances

Screen size (4:3)			Projection distance (L)		Height	Preparation
					position
Diagonal	Height	Width	Wide	Telephoto
					(H1)
length	(SH)	(SW)	(LW)	(LT)
1.01 m(40˝)	0.61 m(2´)	0.81 m(2´8˝)	1.2 m(3´11˝)	1.5 m(4´11˝)	0.06 m(2-13/32˝)
1.27 m(50˝)	0.76 m(2´6˝)	1.02 m(3´4˝)	1.6 m(5´2˝)	1.9 m(6´2˝)	0.08 m(3˝)
1.52 m(60˝)	0.91 m(3´)	1.22 m(4´)	1.9 m(6´2˝)	2.3 m(7´6˝)	0.09 m(3-19/32˝)
1.77 m(70˝)	1.07 m(3´6˝)	1.42 m(4´8˝)	2.2 m(7´2˝)	2.7 m(8´10˝)	0.11 m(4- 6/32˝)
2.03 m(80˝)	1.22 m(4´)	1.63 m(5´4˝)	2.5 m(8´2˝)	3.1 m(10´2˝)	0.12 m(4-26/32˝)
2.28 m(90˝)	1.37 m(4´6˝)	1.83 m(6´)	2.8 m(9´2˝)	3.5 m(11´5˝)	0.14 m(5-13/32˝)
2.54 m(100˝)	1.52 m(5´)	2.03 m(6´8˝)	3.1 m(10´2˝)	3.9 m(12´9˝)	0.15 m(6˝)
3.81 m(150˝)	2.29 m(7´6˝)	3.05 m(10´)	4.7 m(15´5˝)	5.8 m(19´)	0.23 m(9˝)
5.08 m(200˝)	3.05 m(10´)	4.06 m(13´4˝)	6.2 m(20´4˝)	7.8 m(25´7˝)	0.31 m(12˝)
6.35 m(250˝)	3.81 m(12´6˝)	5.08 m(16´8˝)	7.8 m(25´7˝)	9.8 m(32´1˝)	0.38 m(15˝)
7.62 m(300˝)	4.57 m(15´)	6.10 m(20´)	9.4 m(30´10˝)	11.8 m(38´8˝)	0.46 m(18˝)

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).

LW=0.031xSD/0.0254-0.068

Projector position

Top edge of screen

SH	Screen
	L
	H1

Bottom edge of screen

9.6 (3/8)

SW	L
	Screen

<Units: mm (inch)>

L:Projection distance SH: Image height SW:Image width

H1: Distance from center of lens to bottom edge of projected image

LT=0.0393xSD/0.0254-0.066

For 16:9 aspect ratios, the following formula can be used to calculate the projection distance.

LW=0.034xSD/0.0254-0.068

LT=0.043xSD/0.0254-0.066

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.

BIf you set up the projector vertically, it may cause to damage the projector.

BIt is recommended that you set up the projector in a place that is tilted at less than ±30°. Setting up the projector in places that are tilted at more than ±30° may cause malfunctions.

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