VIEWSONIC S50/X50 - Manual (Page 8)

7
Refer to the illustrations and tables below to determine the screen size and
projection distance.
Adjusting the Screen Size and Projection Distance
Top view
a
c
b
Lens center
The screen
Side view
Top view
a
c
b
Lens center
The screen
Side view
If 4:3 aspect ratio
If 16:9 aspect ratio
4
3
9
16
The values shown in the table are calculated for a full size screen
(S50: 800x600 pixels/X50: 1024x768 pixels).
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%)
Screen Size [inch (m)]
a [inch (m)] b
[inch (cm)]
c
[inch (cm)] Min. Max.
30 (0.8) 35 (0.9) 42 (1.1) 1 (2) 17 (44)
40 (1.0) 47 (1.2) 56 (1.4) 1 (3) 23 (58)
50 (1.3) 59 (1.5) 71 (1.8) 1 (4) 29 (73)
60 (1.5) 71 (1.8) 85 (2.2) 2 (4) 34 (87)
70 (1.8) 83 (2.1) 100 (2.5) 2 (5) 40 (102)
80 (2.0) 95 (2.4) 114 (2.9) 2 (6) 46 (116)
90 (2.3) 107 (2.7) 129 (3.3) 3 (7) 51 (131)
100 (2.5) 119 (3.0) 143 (3.6) 3 (7) 57 (145)
120 (3.0) 143 (3.6) 172 (4.4) 3 (9) 69 (174)
150 (3.8) 180 (4.6) 216 (5.5) 4 (11) 86 (218)
200 (5.0) 240 (6.1) 288 (7.3) 6 (15) 114 (290)
250 (6.3) 300 (7.6) 361 (9.2) 7 (18) 143 (363)
300 (7.5) 360 (9.2) 433 (11.0) 9 (22) 171 (435)
Screen Size [inch (m)]
a [inch (m)] b
[inch (cm)]
c
[inch (cm)] Min. Max.
30 (0.8) 38 (1.0) 46 (1.2) 2 (4) 16 (41)
40 (1.0) 51 (1.3) 61 (1.6) 2 (5) 22 (55)
50 (1.3) 64 (1.6) 77 (2.0) 3 (6) 27 (69)
60 (1.5) 77 (2.0) 93 (2.4) 3 (8) 32 (82)
70 (1.8) 90 (2.3) 109 (2.8) 4 (9) 38 (96)
80 (2.0) 104 (2.6) 125 (3.2) 4 (10) 43 (110)
90 (2.3) 117 (3.0) 140 (3.6) 5 (12) 49 (124)
100 (2.5) 130 (3.3) 156 (4.0) 5 (13) 54 (137)
120 (3.0) 156 (4.0) 188 (4.8) 6 (15) 65 (165)
150 (3.8) 196 (5.0) 235 (6.0) 8 (19) 81 (206)
200 (5.0) 261 (6.6) 314 (8.0) 10 (26) 108 (275)
250 (6.3) 327 (8.3) 393 (10.0) 13 (32) 135 (343)
300 (7.5) 393 (10.0) 472 (12.0) 15 (39) 162 (412)