Adjusting The Screen Size And Projection Distance - Hitachi CPX870 User Manual

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Adjusting the Screen Size and Projection Distance

Refer to the illustrations and tables below to determine the screen size and
projection distance.
The values shown in the table are calculated for a full size screen
a:Distance from the projector to the screen (±10%)
b:Distance from the lens center to the bottom of the screen (±10%)
c:Distance from the lens center to the top of the screen (±10%)
The screen
Lens center
c
b
a
The screen
Lens center
c
b
a
Top view
If 4:3 aspect ratio
Screen Size [inch (m)]
Side view
Top view
If 16:9 aspect ratio
Screen Size [inch (m)]
Side view
4
3
a [inch (m)]
Min.
30 (0.8) 42 (1.1) 56 (1.4)
40 (1.0) 57 (1.4) 75 (1.9)
50 (1.3) 72 (1.8) 94 (2.4)
60 (1.5) 87 (2.2) 113 (2.9)
70 (1.8) 102 (2.6) 133 (3.4)
80 (2.0) 117 (3.0) 152 (3.9)
90 (2.3) 131 (3.3) 171 (4.3)
100 (2.5) 146 (3.7) 190 (4.8)
120 (3.0) 176 (4.5) 229 (5.8)
150 (3.8) 221 (5.6) 287 (7.3) 4 (11)
200 (5.0) 296 (7.5) 383 (9.7) 6 (15) 114 (290)
250 (6.3) 371 (9.4) 479 (12.2) 7 (18) 143 (363)
300 (7.5) 446 (11.3) 576 (14.6) 9 (22) 171 (435)
16
9
a [inch (m)]
Min.
30 (0.8) 45 (1.2) 61 (1.5)
40 (1.0) 62 (1.6) 81 (2.1)
50 (1.3) 78 (2.0) 102 (2.6)
60 (1.5) 94 (2.4) 123 (3.1)
70 (1.8) 111 (2.8) 144 (3.7)
80 (2.0) 127 (3.2) 165 (4.2)
90 (2.3) 143 (3.6) 186 (4.7) 4 (11) 47 (119)
100 (2.5) 160 (4.1) 207 (5.3) 5 (12) 53 (135)
120 (3.0) 192 (4.9) 249 (6.3) 6 (14) 65 (166)
150 (3.8) 241 (6.1) 312 (7.9) 7 (18) 82 (207)
200 (5.0) 322 (8.2) 147 (10.6) 9 (24) 106 (270)
250 (6.3) 404 (10.3) 522 (13.3) 12 (29) 124 (315)
300 (7.5) 485 (12.3) 627 (15.9) 14 (35) 128 (324)
b c
[inch (cm)] [inch (cm)]
Max.
1 (2) 17 (44)
1 (3) 23 (58)
1 (4) 29 (73)
2 (4) 34 (87)
2 (5) 40 (102)
2 (6) 46 (116)
3 (7) 51 (131)
3 (7) 57 (145)
3 (9) 69 (174)
86 (218)
b c
[inch (cm)] [inch (cm)]
Max.
1 (4) 16 (41)
2 (5) 21 (54)
2 (6) 26 (67)
3 (7) 31 (79)
3 (8) 36 (92)
4 (9) 41 (105)
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