NEC LT245, LT265 manual 22

2. Installation and Connections

Throw Distance and Screen Size

Screen Width

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

Screen Diagonal

Distance Chart

Screen Height

Screen center

B = Vertical distance between lens center and screen center

C = Throw distance

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

α= Throw angle

NOTE: Distances may vary +/-5%.

(B)

Screen Bottom

(D)

Lens Center

Throw Angle (￿)

Throw Distance (C)

LT265

	Screen Size		B		C		D		α
Diagonal	Width	Height		Wide – Tele				Wide – Tele
inch	inch	inch	inch		inch		inch	degree
30	24	18	12.6	45.6	–	56.0	3.6	15.4	– 12.7
40	32	24	16.8	61.5	–	75.4	4.8	15.3	– 12.6
60	48	36	25.2	93.5	–	114.1	7.2	15.1	– 12.5
67	54	40	28.1	104.7	–	127.7	8.0	15.0	– 12.4
72	58	43	30.2	112.7	–	137.4	8.6	15.0	– 12.4
80	64	48	33.6	125.5	–	152.9	9.6	15.0	– 12.4
84	67	50	35.3	131.9	–	160.6	10.1	15.0	– 12.4
90	72	54	37.8	141.5	–	172.2	10.8	15.0	– 12.4
100	80	60	42.0	157.4	–	191.6	12.0	14.9	– 12.4
120	96	72	50.4	189.4	–	230.3	14.4	14.9	– 12.3
150	120	90	63.0	237.3	–	288.4	18.0	14.9	– 12.3
180	144	108	75.6	285.3	–	346.6	21.6	14.8	– 12.3
200	160	120	84.0	317.2	–	385.3	24.0	14.8	– 12.3
210	168	126	88.2	333.2	–	404.7	25.2	14.8	– 12.3
240	192	144	100.8	381.2	–	462.8	28.8	14.8	– 12.3
261	209	157	109.7	414.7	–	503.4	31.4	14.8	– 12.3
270	216	162	113.5	429.1	–	520.9	32.5	14.8	– 12.3
300	240	180	126.1	477.0	–	579.0	36.1	14.8	– 12.3
350	280	210	147.1	557.0	–	675.8	42.1	14.8	– 12.3
400	320	240	168.1	636.9	–	772.7	48.1	14.8	– 12.3
450	360	270	189.1	716.8	–	869.5	54.1	14.8	– 12.3
500	400	300	210.1	796.7	–	966.4	60.1	14.8	– 12.3

LT245

	Screen Size		B		C		D		α
Diagonal	Width	Height		Wide – Tele				Wide – Tele
inch	inch	inch	inch		inch		inch	degree
30	24	18	12.5	35.7	–	43.3	3.5	19.4	– 16.2
40	32	24	16.7	48.2	–	58.4	4.7	19.1	– 16.0
60	48	36	25.1	73.3	–	88.5	7.1	18.9	– 15.9
67	54	40	28.1	82.1	–	99.1	8.0	18.9	– 15.8
72	58	43	30.2	88.4	–	106.6	8.6	18.8	– 15.8
80	64	48	33.5	98.5	–	118.7	9.5	18.8	– 15.8
84	67	50	35.2	103.5	–	124.7	10.0	18.8	– 15.8
90	72	54	37.7	111.0	–	133.7	10.7	18.8	– 15.8
100	80	60	41.9	123.6	–	148.8	11.9	18.7	– 15.7
120	96	72	50.3	148.7	–	178.9	14.3	18.7	– 15.7
150	120	90	62.9	186.3	–	224.1	17.9	18.7	– 15.7
180	144	108	75.5	224.0	–	269.3	21.5	18.6	– 15.7
200	160	120	83.9	249.1	–	299.5	23.9	18.6	– 15.7
210	168	126	88.1	261.7	–	314.5	25.1	18.6	– 15.7
240	192	144	100.7	299.3	–	359.7	28.7	18.6	– 15.6
261	209	157	109.5	325.7	–	391.4	31.2	18.6	– 15.6
270	216	162	113.3	337.0	–	405.0	32.3	18.6	– 15.6
300	240	180	125.9	374.6	–	450.2	35.9	18.6	– 15.6
350	280	210	146.9	437.4	–	525.5	41.9	18.6	– 15.6
400	320	240	167.9	500.2	–	600.8	47.9	18.6	– 15.6
450	360	270	188.9	563.0	–	676.2	53.9	18.5	– 15.6
500	400	300	209.9	625.7	–	751.5	59.9	18.5	– 15.6

	Screen Size			B		C		D		α
Diagonal		Width	Height		Wide – Tele				Wide – Tele
inch	mm	mm	mm	mm		mm		mm	degree
30	762	610	457	320	1,157	–	1,423	91	15.4	– 12.7
40	1016	813	610	427	1,563	–	1,915	122	15.3	– 12.6
60	1524	1219	914	640	2,375	–	2,899	183	15.1	– 12.5
67	1702	1361	1021	714	2,659	–	3,243	204	15.0	– 12.4
72	1829	1463	1097	768	2,862	–	3,489	219	15.0	– 12.4
80	2032	1626	1219	853	3,187	–	3,883	244	15.0	– 12.4
84	2134	1707	1280	896	3,349	–	4,080	256	15.0	– 12.4
90	2286	1829	1372	960	3,593	–	4,375	274	15.0	– 12.4
100	2540	2032	1524	1067	3,999	–	4,867	305	14.9	– 12.4
120	3048	2438	1829	1280	4,811	–	5,851	366	14.9	– 12.3
150	3810	3048	2286	1601	6,028	–	7,327	458	14.9	– 12.3
180	4572	3658	2743	1921	7,246	–	8,802	549	14.8	– 12.3
200	5080	4064	3048	2134	8,058	–	9,786	610	14.8	– 12.3
210	5334	4267	3200	2241	8,464	–10,278		641	14.8	– 12.3
240	6096	4877	3658	2562	9,682	–11,754		733	14.8	– 12.3
261	6629	5304	3978	2786	10,534	–12,787		797	14.8	– 12.3
270	6858	5486	4115	2882	10,899	–13,230		824	14.8	– 12.3
300	7620	6096	4572	3202	12,117	–14,706		916	14.8	– 12.3
350	8890	7112	5334	3736	14,147	–17,166		1069	14.8	– 12.3
400	10160	8128	6096	4270	16,176	–19,626		1222	14.8	– 12.3
450	11430	9144	6858	4804	18,206	–22,086		1375	14.8	– 12.3
500	12700	10160	7620	5337	20,235	–24,545		1527	14.8	– 12.3
	Screen Size			B		C		D		α
Diagonal		Width	Height		Wide – Tele				Wide – Tele
inch	mm	mm	mm	mm		mm		mm	degree
30	762	610	457	319	906	–	1,100	90	19.4	– 16.2
40	1016	813	610	425	1,225	–	1,483	120	19.1	– 16.0
60	1524	1219	914	639	1,863	–	2,248	181	18.9	– 15.9
67	1702	1361	1021	713	2,086	–	2,516	203	18.9	– 15.8
72	1829	1463	1097	766	2,246	–	2,707	218	18.8	– 15.8
80	2032	1626	1219	852	2,501	–	3,014	242	18.8	– 15.8
84	2134	1707	1280	894	2,628	–	3,167	254	18.8	– 15.8
90	2286	1829	1372	958	2,820	–	3,396	273	18.8	– 15.8
100	2540	2032	1524	1065	3,139	–	3,779	303	18.7	– 15.7
120	3048	2438	1829	1278	3,776	–	4,545	364	18.7	– 15.7
150	3810	3048	2286	1598	4,733	–	5,693	455	18.7	– 15.7
180	4572	3658	2743	1918	5,689	–	6,841	547	18.6	– 15.7
200	5080	4064	3048	2132	6,327	–	7,607	608	18.6	– 15.7
210	5334	4267	3200	2238	6,646	–	7,989	638	18.6	– 15.7
240	6096	4877	3658	2558	7,603	–	9,137	729	18.6	– 15.6
261	6629	5304	3978	2782	8,272	–	9,941	793	18.6	– 15.6
270	6858	5486	4115	2878	8,559	–10,286		821	18.6	– 15.6
300	7620	6096	4572	3198	9,516	–11,434		912	18.6	– 15.6
350	8890	7112	5334	3731	11,110	–13,348		1064	18.6	– 15.6
400	10160	8128	6096	4264	12,705	–15,261		1216	18.6	– 15.6
450	11430	9144	6858	4798	14,299	–17,175		1369	18.5	– 15.6
500	12700	10160	7620	5331	15,893	–19,089		1521	18.5	– 15.6

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