Projector to screen distance ready reckoner
The projector to screen distance required for a desired image size is
determined from the image magnification of the lens; if you use the screen
width for your calculations, the distance will be the same regardless of
the aspect ratio.
Screen Width (feet)
|
Screen Width (mm)
|
1
|
1.3
|
1.5
|
2.0
|
2.5
|
3.0
|
5.0
|
7.0
|
Lens Magnification Ratio (x : 1.0)
|
|
4' |
1219mm |
4' |
5.2' |
6' |
8' |
10' |
12' |
20' |
28' |
Projection Distance (feet)
|
|
5' |
1524mm |
5' |
6.5 |
7.5 |
10' |
12.5 |
15' |
25' |
35' |
|
6' |
1829mm |
6' |
7.8 |
9' |
12' |
15' |
18' |
30' |
42' |
|
7' |
2134mm |
7' |
9.1 |
10.5 |
14' |
17.5' |
21' |
35' |
49' |
|
8' |
2438mm |
8' |
10.4 |
12' |
16' |
20' |
24' |
40' |
56' |
|
9' |
2743mm |
9' |
11.7 |
13.5 |
18' |
22.5' |
27' |
45' |
63' |
|
10' |
3048mm |
10' |
13 |
15' |
20' |
25' |
30' |
50' |
70' |
|
12" |
3658mm |
12' |
15.6 |
18' |
24' |
30' |
36' |
60' |
84' |
N.B. When rear projecting remember to allow a few feet for the
projector itself in your calculations!
|