CLOSE-UP FOCUSING FOR +1, +2, +3, DIOPTER LENSES
Set Distance on
Focusing Mount
to:
With +1 Diopter
Lens, the Distance
from Front of Lens
to subject is:
With +2 Diopter
Lens, the Distance
from Front of Lens
to subject is:
With +3 Diopter
Lens, the Distance
from Front of Lens
to subject is:
ft.
m.
in.
cm.
in.
cm.
in.
cm.
inf.
inf.
39.4
100
19.7
50
13.1
33
40
20
36
95
19
49
12.7
32.5
20
10
33.8
90.5
18.2
47.5
12.4
32
13
6
31
85.5
17.5
46
12.1
31.5
10
4
29.7
80
16.9
44.5
11.8
31
8
3
28
75
16.7
43
11.7
30
7
2
26.9
67
16.4
40
11.6
28.5
5
1.5
23.8
60
14.9
37.5
10.8
27
4
1.2
21.7
54.5
14
35
10.3
26
3.5
1
20.5
50
13
33
10
25
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.
CLOSE-UP FOCUSING WITH THE NI SUPPLEMENTARY LENS
(For Conversion into metric units, see page 62)
Set
Focusing
Scale of
Camera
to (feet)
Subject
Distance*
(inches)
Scale of
Reproduction
Field Size
in Inches
Depth of Field* in inches at Aperture
f
5.6
f
8
f
11
f
16
f
22
from
to
from
to
from
to
from
to
from
to
inf
37.37
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
25
33.75
0.062
15x22.75
31.12 37.87 30.37 40.62 29.87 43.5 28.37 49.5 27.12 58.25
15
32.5
0.066
14.37x21.75 30.5 35.62 29.5
37
28.12 39.12 27.5 44.37 26.37 53.37
10
30.25
0.070
13.62x20.5 28.37 33.5 27.12 35.25 26.37 37.37 25.25 41.12 24.25
48
8
29.25
0.073
13x19.37
27.5
32
26.5 33.5 25.5
35
24.37 38.12 22.5
43
7
28.37
0.076
12.5x18.5
26
30.25 25.25
31
24.25 32.75 23.12 35.5 21.62 39.75
6
27.12
0.078
12x17.87
25.12 28.5 24.37 29.37 23.25
31
22.37 35.62
21
37.25
5
26
0.082
11.5x17.25 24.12 27.75 23.5 28.62 22.75 29.87 21.62
32
20.37 35.25
4.5
25
0.084
11.25x16.87 23.25 26.37 22.62 27.25 21.62 28.12 20.87
30
19.75 33.37
4
23.75
0.089
10.75x16.12 22.25
25
21.62 25.75
21
26.62
20
28.25 18.37 30.25
3.5
23
0.096
9.87x14.87 21.37 23.62 20.37
24
20.12 26.12 19.75 27.62
18
28.75
* Measured from the subject to the focal plane; this corresponds approximately to the rear upper edge of the
camera top.
CLOSE-UP FOCUSING WITH THE NII SUPPLEMENTARY LENS
(For Conversion into metric units, see page 62)
Set
Focusing
Scale of
Camera
to (feet)
Subject
Distance*
(inches)
Scale of
Reproduction
Field Size
in Inches
Depth of Field* in inches at Aperture
f
5.6
f
8
f
11
f
16
f
22
from
to
from
to
from
to
from
to
from
to
inf
19.62
0.112
8.5x12.5
19
20.75 18.37
21
18.25 21.75 18.12 22.37 17.37 24.25
25
18.62
0.119
7.87x11.25 18.25
20
17.87 20.37 17.5 20.87
17
21.87 16.37 23.12
15
18.25
0.123
7.75x11.5 17.62 19.25 17.37 19.62 17.12 20.12 16.5
21
16
22.12
10
17.62
0.127
7.62x11.12
17
18.12 16.75 18.87 16.5 19.37 16.12 20.12 15.5 21.12
8
17.25
0.131
7.25x10.87 16.62
18
16.37 18.37
16
18.75 15.5 19.5 15.12 20.5
7
17.12
0.136
6.87x10.5 16.37 17.62 15.87 18.12 15.75 18.5 15.37 19.25
15
20.25
6
16.25
0.139
6.75x10.37 16.25 17.5 15.62
18
15.5 18.37 15.25
19
14.75
20
