NEC LT180 manual Throw Distance and Screen Size, Distance Chart

2. INSTALLATION AND CONNECTIONS

Throw Distance and Screen Size

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.

Distance Chart

Screen Width

Screen Diagonal

Screen Height

Screen center

(B)

(D)

Screen Bottom

Lens Center

Throw Angle (α )

Throw Distance (C)

	Screen Size (4:3)						B					C			D				α
Diagonal		Width		Height		wide		tele		wide		tele		wide		tele		wide		tele
inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	degree		degree
30	762.0	24.0	609.6	18.0	457.2	7.1	181.4	7.2	182.1	31.4	797.7	37.7	957.2	-1.8	-45.2	-1.8	-45.5	12.8		10.8
40	1016.0	32.0	812.8	24.0	609.6	9.5	241.8	9.6	242.8	42.5	1080.1	50.9	1292.6	-2.4	-60.2	-2.4	-60.2	12.6		10.6
50	1270.0	40.0	1016.0	30.0	762.0	11.9	302.2	11.9	303.5	53.6	1362.6	64.1	1628.0	-3.0	-75.3	-3.0	-75.8	12.5		10.6
60	1524.0	48.0	1219.2	36.0	914.4	14.3	362.6	14.3	364.2	64.8	1645.0	77.3	1963.4	-3.6	-90.3	-3.6	-90.9	12.4		10.5
67	1701.8	53.6	1361.4	40.2	1021.1	15.9	404.9	16.0	406.7	72.5	1842.7	86.5	2198.2	-4.0	-100.9	-4.0	-101.5	12.4		10.5
72	1828.8	57.6	1463.0	43.2	1097.3	17.1	435.1	17.2	437.1	78.1	1984.0	93.1	2365.9	-4.3	-108.4	-4.3	-109.1	12.4		10.5
84	2133.6	67.2	1706.9	50.4	1280.2	20.0	507.6	20.1	509.9	91.5	2322.9	109.0	2768.3	-5.0	-126.4	-5.0	-127.3	12.3		10.4
90	2286.0	72.0	1828.8	54.0	1371.6	21.4	543.8	21.5	546.3	98.1	2492.4	116.9	2969.6	-5.3	-135.5	-5.4	-136.4	12.3		10.4
100	2540.0	80.0	2032.0	60.0	1524.0	23.8	604.2	23.9	607.0	109.2	2774.8	130.1	3305.0	-5.9	-150.5	-6.0	-151.5	12.3		10.4
120	3048.0	96.0	2438.4	72.0	1828.8	28.5	725.0	28.7	728.4	131.5	3339.7	156.5	3975.8	-7.1	-180.6	-7.2	-181.8	12.3		10.4
150	3810.0	120.0	3048.0	90.0	2286.0	35.7	906.2	35.8	910.5	164.8	4187.1	196.1	4982.0	-8.9	-225.7	-8.9	-227.3	12.2		10.4
180	4572.0	144.0	3657.6	108.0	2743.2	42.8	1087.4	43.0	1092.6	198.2	5034.4	235.8	5988.2	-10.7	-270.9	-10.7	-272.7	12.2		10.3
200	5080.0	160.0	4064.0	120.0	3048.0	47.6	1208.2	47.8	1214.0	220.4	5599.3	262.2	6658.9	-11.9	-301.0	-11.9	-303.0	12.2		10.3

B = Vertical distance between lens center and screen center C = Throw distance

D = Vertical distance between lens center and bottom of screen for desktop (top of screen for ceiling)

α= Throw angle

NOTE: Distances may vary +/-5%.

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