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7 ViewSonic PJ650
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 (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%).
If 4:3 aspect ratio.
If 16:9 aspect ratio.
Screen Size
Inches (m)
a
Inches (m)
Minimum Maximum
b
Inches
(cm)
c
Inches
(cm)
30 (0.8) 35 (0.9) 42 (1.1) 1 (2) 17 (55)
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
Inches (m)
a
Inches (m)
Minimum Maximum
b
Inches
(cm)
c
Inches
(cm)
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)
The screen
Top view
Side view
Top view
Side view
Lens center
Lens center
The screen