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Set Distance on
Focusing Mount
ft.
inf.
40
20
13
10
8
7
5
4
3.5
The metric and inch figures in this table are not necessarily exact equivalents; each set of figures does, however,
indicate the correct distances for any setting of the corresponding focusing scale. Therefore, always use the
distances in centimetres only with the focusing scale settings in metres and the inch measurements with focusing
scale settings in feet. (For exact conversions, see page 62.)
The depth of field when working at these short distances is obviously rather limited. The tables on pages 47-49 for
the N lenses give an indication of the depth of field under these conditions.
Set
Focusing
Subject
Scale of
Scale of
Distance*
Reproduction
Camera
(inches)
to (feet)
inf
37.37
25
33.75
15
32.5
10
30.25
8
29.25
7
28.37
6
27.12
5
26
4.5
25
4
23.75
3.5
23
* Measured from the subject to the focal plane; this corresponds approximately to the rear upper edge of the
Set
Focusing
Subject
Scale of
Distance*
Reproduction
Camera
(inches)
to (feet)
inf
19.62
25
18.62
15
18.25
10
17.62
8
17.25
7
17.12
6
16.25
CLOSE-UP FOCUSING FOR +1, +2, +3, DIOPTER LENSES
With +1 Diopter
Lens, the Distance
from Front of Lens
to:
to subject is:
m.
in.
inf.
39.4
20
36
10
33.8
6
31
4
29.7
3
28
2
26.9
1.5
23.8
1.2
21.7
1
20.5
CLOSE-UP FOCUSING WITH THE NI SUPPLEMENTARY LENS
(For Conversion into metric units, see page 62)
Field Size
in Inches
0.058
16.75x24.75 34.75 42.5 33.37 45.12 31.5 48.62 29.75 54.75 27.62 65.37
0.062
15x22.75
0.066
14.37x21.75 30.5 35.62 29.5
0.070
13.62x20.5 28.37 33.5 27.12 35.25 26.37 37.37 25.25 41.12 24.25
0.073
13x19.37
0.076
12.5x18.5
0.078
12x17.87
0.082
11.5x17.25 24.12 27.75 23.5 28.62 22.75 29.87 21.62
0.084
11.25x16.87 23.25 26.37 22.62 27.25 21.62 28.12 20.87
0.089
10.75x16.12 22.25
0.096
9.87x14.87 21.37 23.62 20.37
CLOSE-UP FOCUSING WITH THE NII SUPPLEMENTARY LENS
(For Conversion into metric units, see page 62)
Scale of
Field Size
in Inches
0.112
8.5x12.5
0.119
7.87x11.25 18.25
0.123
7.75x11.5 17.62 19.25 17.37 19.62 17.12 20.12 16.5
0.127
7.62x11.12
0.131
7.25x10.87 16.62
0.136
6.87x10.5 16.37 17.62 15.87 18.12 15.75 18.5 15.37 19.25
0.139
6.75x10.37 16.25 17.5 15.62
With +2 Diopter
Lens, the Distance
from Front of Lens
to subject is:
cm.
in.
cm.
100
19.7
50
95
19
49
90.5
18.2
47.5
85.5
17.5
46
80
16.9
44.5
75
16.7
43
67
16.4
40
60
14.9
37.5
54.5
14
35
50
13
33
Depth of Field* in inches at Aperture
f5.6
f8
from
to
from
to
31.12 37.87 30.37 40.62 29.87 43.5 28.37 49.5 27.12 58.25
37
27.5
32
26.5
33.5
26
30.25 25.25
31
25.12 28.5 24.37 29.37 23.25
25
21.62 25.75
24
camera top.
Depth of Field* in inches at Aperture
f5.6
f8
from
to
from
to
19
20.75 18.37
21
20
17.87 20.37 17.5 20.87
17
18.12 16.75 18.87 16.5 19.37 16.12 20.12 15.5 21.12
18
16.37 18.37
18
With +3 Diopter
Lens, the Distance
from Front of Lens
to subject is:
in.
cm.
13.1
33
12.7
32.5
12.4
32
12.1
31.5
11.8
31
11.7
30
11.6
28.5
10.8
27
10.3
26
10
25
f11
f16
from
to
from
to
28.12 39.12 27.5 44.37 26.37 53.37
25.5
35
24.37 38.12 22.5
24.25 32.75 23.12 35.5 21.62 39.75
31
22.37 35.62
32
30
21
26.62
20
28.25 18.37 30.25
20.12 26.12 19.75 27.62
f11
f16
from
to
from
to
18.25 21.75 18.12 22.37 17.37 24.25
17
21.87 16.37 23.12
21
16
18.75 15.5
19.5 15.12 20.5
15.5 18.37 15.25
19
f22
from
to
48
43
21
37.25
20.37 35.25
19.75 33.37
18
28.75
f22
from
to
16
22.12
15
20.25
14.75
20
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