NEC LT280, LT380 C, D, LT380, LT280, Distance Chart, Throw distance, α= Throw angle, Throw Distance and Screen Size, NOTE: Distances may vary +/-5%

2. Installation and ConnectionsThrow 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.

		Screen center
		α
				B
				D
		2.54”/64.5mm
	Projector bottom	Lens center	Screen bottom
		C
Distance Chart
B = Vertical distance between lens center and screen center
C =	Throw distance
D =	Vertical distance between lens center and screen bottom (top of screen for ceiling application)

α= Throw angleNOTE: Distances may vary +/-5%.

LT380

	Screen Size		B		C		D		α
Diagonal	Width	Height		Wide – Tele				Wide – Tele
inch	inch	inch	inch		inch		inch	degree
21	17	13	5	– –		28	-2	– – 9.2
25	20	15	5	27	–	33	-2	11.2	– 9.2
30	24	18	6	33	–	41	-3	11.1	– 9.0
40	32	24	9	45	–	55	-3	10.8	– 8.9
60	48	36	13	69	–	84	-5	10.6	– 8.7
72	58	43	16	83	– 102		-6	10.5	– 8.7
80	64	48	17	93	– 113		-7	10.5	– 8.7
84	67	50	18	98	– 119		-7	10.5	– 8.7
90	72	54	19	105	– 128		-8	10.5	– 8.6
100	80	60	22	117	– 142		-8	10.4	– 8.6
120	96	72	26	141	– 171		-10	10.4	– 8.6
150	120	90	32	176	– 214		-13	10.4	– 8.6
180	144	108	39	212	– 257		-15	10.4	– 8.6
200	160	120	43	236	– 286		-17	10.3	– 8.6
210	168	126	45	248	– 301		-18	10.3	– 8.6
240	192	144	52	284	– 344		-20	10.3	– 8.6
270	216	162	58	320	– 387		-23	10.3	– 8.5
300	240	180	65	356	– 431		-25	10.3	– 8.5

	Screen Size			B		C		D		α
Diagonal		Width	Height		Wide – Tele				Wide – Tele
inch	mm	mm	mm	mm		mm		mm	degree
21	533	427	320	115	– –		710	-45	– – 9.2
25	635	508	381	137	690	–	850	-54	11.2	– 9.2
30	762	610	457	164	840	–	1040	-64	11.1	– 9.0
40	1016	813	610	219	1150	–	1400	-86	10.8	– 8.9
60	1524	1219	914	329	1750	–	2140	-129	10.6	– 8.7
72	1829	1463	1097	394	2120	–	2580	-154	10.5	– 8.7
80	2032	1626	1219	438	2360	–	2870	-171	10.5	– 8.7
84	2134	1707	1280	460	2480	–	3020	-180	10.5	– 8.7
90	2286	1829	1372	493	2660	–	3240	-193	10.5	– 8.6
100	2540	2032	1524	548	2970	–	3600	-214	10.4	– 8.6
120	3048	2438	1829	657	3570	–	4340	-257	10.4	– 8.6
150	3810	3048	2286	821	4480	–	5440	-322	10.4	– 8.6
180	4572	3658	2743	986	5390	–	6540	-386	10.4	– 8.6
200	5080	4064	3048	1095	6000	–	7270	-429	10.3	– 8.6
210	5334	4267	3200	1150	6300	–	7640	-450	10.3	– 8.6
240	6096	4877	3658	1314	7210	–	8740	-514	10.3	– 8.6
270	6858	5486	4115	1479	8120	–	9840	-579	10.3	– 8.5
300	7620	6096	4572	1643	9030	– 10940		-643	10.3	– 8.5

LT280

	Screen Size		B		C		D		α
Diagonal	Width	Height		Wide – Tele				Wide – Tele
inch	inch	inch	inch		inch		inch	degree
21	17	13	5	– –		28	-1	– –		10.0
25	20	15	6	28	–	34	-2	12.1	–	10.0
30	24	18	7	34	–	41	-2	11.9	–	9.8
40	32	24	10	46	–	56	-2	11.8	–	9.8
60	48	36	14	69	–	84	-4	11.7	–	9.6
72	58	43	17	83	–	102	-4	11.6	–	9.6
80	64	48	19	93	–	113	-5	11.6	–	9.6
84	67	50	20	98	–	119	-5	11.6	–	9.6
90	72	54	21	105	–	127	-6	11.6	–	9.6
100	80	60	24	117	–	141	-6	11.6	–	9.6
120	96	72	29	141	–	170	-7	11.5	–	9.6
150	120	90	36	176	–	213	-9	11.5	–	9.5
180	144	108	43	211	–	256	-11	11.5	–	9.5
200	160	120	48	235	–	285	-12	11.5	–	9.5
210	168	126	50	247	–	299	-13	11.5	–	9.5
240	192	144	57	283	–	342	-15	11.5	–	9.5
270	216	162	64	318	–	385	-17	11.5	–	9.5
300	240	180	72	354	–	428	-18	11.5	–	9.5

	Screen Size			B		C		D		α
Diagonal		Width	Height		Wide – Tele				Wide – Tele
inch	mm	mm	mm	mm		mm		mm	degree
21	533	427	320	127	– –		720	-33	– – 10.0
25	635	508	381	152	710	–	860	-39	12.1	–	10.0
30	762	610	457	182	860	–	1050	-47	11.9	–	9.8
40	1016	813	610	243	1160	–	1410	-62	11.8	–	9.8
60	1524	1219	914	364	1760	–	2140	-93	11.7	–	9.6
72	1829	1463	1097	437	2120	–	2580	-112	11.6	–	9.6
80	2032	1626	1219	485	2360	–	2870	-125	11.6	–	9.6
84	2134	1707	1280	509	2480	–	3010	-131	11.6	–	9.6
90	2286	1829	1372	546	2660	–	3230	-140	11.6	–	9.6
100	2540	2032	1524	606	2960	–	3590	-156	11.6	–	9.6
120	3048	2438	1829	728	3570	–	4320	-187	11.5	–	9.6
150	3810	3048	2286	909	4470	–	5410	-234	11.5	–	9.5
180	4572	3658	2743	1091	5370	–	6510	-280	11.5	–	9.5
200	5080	4064	3048	1213	5970	–	7230	-311	11.5	–	9.5
210	5334	4267	3200	1273	6270	–	7600	-327	11.5	–	9.5
240	6096	4877	3658	1455	7180	–	8690	-374	11.5	–	9.5
270	6858	5486	4115	1637	8080	–	9780	-420	11.5	–	9.5
300	7620	6096	4572	1819	8980	– 10870		-467	11.5	–	9.5

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