IBM VT470, VT676 Installation and Connections 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 center
Screen Height
(B)
(D)	Screen Bottom
Lens Center
Throw Angle (￿)

Throw Distance (C)

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%.

VT676/VT670/VT575/VT470

	Screen Size				B	C			D			α
Diagonal	Width		Height			Wide – Tele					Wide – Tele
inch	inch		inch		inch	inch			inch		degree
21	17		13		5	–– –	29	-1			–– – 9.9
25	20		15		6	28 –	34	-2		12.0		– 9.8
30	24		18		7	34 –	42	-2		11.9		– 9.8
40	32		24		10	46 –	56	-2		11.7		– 9.7
60	48		36		14	70 –	85	-4		11.6		– 9.6
72	58		43		17	84 –	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		22	105 –	128	-6		11.5		– 9.6
100	80		60		24	117 –	142	-6		11.5		– 9.6
120	96		72		29	141 –	171	-7		11.5		– 9.5
150	120		90		36	176 –	214	-9		11.5		– 9.5
180	144		108		43	212 –	257	-11		11.5		– 9.5
200	160		120		48	236 –	285	-12		11.5		– 9.5
210	168		126		50	247 –	300	-13		11.5		– 9.5
240	192		144		57	283 –	343	-15		11.5		– 9.5
270	216		162		65	319 –	386	-17		11.4		– 9.5
300	240		180		72	354 –	429	-18		11.4		– 9.5
VT47
				Screen Size			B		C		D		α
		Diagonal		Width		Height
			inch		inch	inch	inch		inch		inch		degree
		25		20		15	6		23		-2		14.6
		30		24		18	7		28		-2		14.5
		40		32		24	10		37		-2		14.4
		60		48		36	14		56		-4		14.2
		72		58		43	17		68		-4		14.2
		80		64		48	19		76		-5		14.2
		84		67		50	20		80		-5		14.2
		90		72		54	22		85		-6		14.1
		100		80		60	24		95		-6		14.1
		120		96		72	29		114		-7		14.1
		150		120		90	36		143		-9		14.1
		180		144		108	43		172		-11		14.1
		200		160		120	48		191		-12		14.0
		210		168		126	50		201		-13		14.0
		240		192		144	57		229		-15		14.0
		270		216		162	65		258		-17		14.0
		300		240		180	72		287		-18		14.0

	Screen Size		B		C			D		α
Diagonal	Width	Height		Wide – Tele					Wide – Tele
mm	mm	mm	mm	mm				mm	degree
533	427	320	130	––– –		730		-30	–– – 9.9
635	508	381	150	720 –		870		-40	12.0	– 9.8
762	610	457	180	870 –		1060		-50	11.9	– 9.8
1016	813	610	240	1170 –		1420		-60	11.7	– 9.7
1524	1219	914	360	1770 –		2150		-90	11.6	– 9.6
1829	1463	1097	440	2130 –		2590		-110	11.6	– 9.6
2032	1626	1219	490	2370 –		2880		-120	11.6	– 9.6
2134	1707	1280	510	2490 –		3020		-130	11.6	– 9.6
2286	1829	1372	550	2670 –		3240		-140	11.5	– 9.6
2540	2032	1524	610	2970 –		3600		-160	11.5	– 9.6
3048	2438	1829	730	3580 –		4330		-190	11.5	– 9.5
3810	3048	2286	910	4480 –		5420		-230	11.5	– 9.5
4572	3658	2743	1090	5380 –		6520		-280	11.5	– 9.5
5080	4064	3048	1210	5980 –		7240		-310	11.5	– 9.5
5334	4267	3200	1270	6280 –		7610		-330	11.5	– 9.5
6096	4877	3658	1460	7190 –		8700		-370	11.5	– 9.5
6858	5486	4115	1640	8090 –		9790		-420	11.4	– 9.5
7620	6096	4572	1820	8990 –		10880		-470	11.4	– 9.5
	Screen Size		B	C		D		α
Diagonal	Width	Height
mm	mm	mm	mm	mm	mm		degree
635	508	381	150	580		-40		14.6
762	610	457	180	700		-50		14.5
1016	813	610	240	950		-60		14.4
1524	1219	914	360	1440		-90		14.2
1829	1463	1097	440	1730	-110			14.2
2032	1626	1219	490	1920	-120			14.2
2134	1707	1280	510	2020	-130			14.2
2286	1829	1372	550	2170	-140			14.1
2540	2032	1524	610	2410	-160			14.1
3048	2438	1829	730	2900	-190			14.1
3810	3048	2286	910	3630	-230			14.1
4572	3658	2743	1090	4360	-280			14.1
5080	4064	3048	1210	4850	-310			14.0
5334	4267	3200	1270	5100	-330			14.0
6096	4877	3658	1460	5830	-370			14.0
6858	5486	4115	1640	6560	-420			14.0
7620	6096	4572	1820	7290	-470			14.0

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