Slide Projection Lens
Projection Calculator
These projection chart calculations are based on a 35mm slide format with an
aperture that is 1.346 inches wide and 0.902 inches high. Measurements
are made from the film plane to the screen. With Navitar fixed focus lenses,
the tolerance in the projection focal length is +/- 1%. Closer matching
tolerances are available on request. Scroll down for metric chart.
Zoom Lenses - Inches
Width
Height
2.75"-5"
4"-8"
6"-9"
8-12"
12"
8"
2'6" - 4'6"
3'8" - 7'4"
5'6" - 8'3"
7'4" - 11'
18"
12"
3'7" - 6'4"
5'2" - 10'4"
7'9" - 11'7"
10'4" - 15'5"
24"
16"
4'7" - 8'2"
6'7" - 13'3"
9'11" - 14'11"
13'3" - 19'11'
36"
24"
6'7" - 11'10"
9'7" - 19'2"
14'5" - 21'7"
19'2" - 28'9'
40"
27"
7'4" - 13'
10'7" - 21'2'
15'11" - 23'10"
21'2" - 31'9'
50"
33.5"
9' - 16'1"
13'1" - 26'1"
19''7" - 29'5"
26'1" - 39'2"
60"
40"
10'8' - 19'1"
15'6" - 31'1"
23'4" - 34'11"
31'1" - 46'7"
70"
47"
12'5" - 22'2"
18' - 36'
27' - 40'6"
36' - 54'
7'
4'8.5"
14'10" - 26'5"
21'5" - 42'11"
32'3" - 48'4"
42'11" - 64'5"
8'
5'4.5"
16'10" - 30'1"
24'5" - 48'11"
36'8" - 55'
48'11" - 73'4"
9'
6'5"
18'11" - 33'9"
27'5' - 54'10"
41'2" - 61'8"
54'10" - 82'3"
10'
6'8.5"
20'11" - 37'5"
30'5" - 60'9"
45'7" - 68'4"
60'9 - 91'2"
12'
8'.5"
25' - 44'8"
36'4" - 72'8"
54'6" - 81'9"
72'8" - 109'
14'
9'4.5"
29'2" - 52'
42'3" - 84'7"
63'5" - 95'1"
84'7" - 126'10"
16
10'8.5"
33'3" - 59'4"
48'3" - 96'5"
72'4" - 108'6"
96'5" - 144'8"
18'
12'.5"
37'4" - 66'8"
54'2" - 108'4"
81'3" - 121'10"
108'4" - 162'6"
20'
13'5"
41'5" - 73'11"
60'1" - 120'2"
90'2" - 135'3"
120'2" - 180'4"
Zoom Lenses - Metric
Width
Height
70mm-
100mm-
150mm-
200mm-
0.5
0.34
1.22
2.04
1.77
3.37
2.55
3.81
3.49
5.32
1
0.67
2.24
3.86
3.29
6.24
4.78
7.15
6.52
9.92
2
1.34
4.29
7.52
6.33
11.99
9.25
13.84
12.58
19.12
3
2.01
6.34
11.18
9.37
17.74
13.71
20.54
18.65
28.32
4
2.68
8.4
14.84
12.41
23.5
18.18
27.23
24.72
37.53
5
3.35
10.45
18.5
15.45
29.25
22.65
33.93
30.79
46.73
6
4.02
12.5
22.16
18.49
35.01
27.11
40.62
36.86
55.94
7
4.69
14.55
25.82
21.54
40.76
31.58
47.32
42.93
65.14
8
5.36
16.6
29.48
24.58
46.52
36.05
54.02
49
74.35
9
6.03
18.65
33.14
27.62
52.27
40.51
60.71
55.06
83.56
10
6.7
20.71
36.8
30.66
58.03
44.98
67.41
61.13
92.76
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