Zhumell Rangefinder RF645 User Manual
Page 24
24
4. Other Features
4-6 Depth of Field
4-6 Depth of Field
Since the Bronica RF 645 is a coupled rangefinder camera compro-
mising separate shooting and viewfinder optical systems, the sharp
focus range is not directly displayed in the viewfinder. The depth of
field must therefore be read from the depth of field scale on the lens,
or calculated from the depth of field table.
1. To read the depth of field on the lens, focus on a subject, then
read two distances on the distance scale between the pair of
depth-of-field lines corresponding to the f-number set on the
aperture ring. In the illustration, the 65mm lens is focused on a
subject at 3 meters with its aperture set at f/8. The depth of
filed range of approximately 2.5 to 4 meters is found between
the pair of f/8 lines on the depth of field scale. The subjects
within these two distances will be photographed in sharp
focus. On the depth of field table of the 65mm lens, the box
located where the horizontal line for 3 meters and the vertical
column for the f/8 intersect includes the distance range corre
sponding to the depth of field of 2.52 to 3.71 meters.
Note: The depth of field tables for lenses other than the 65mm lens is
printed on the instruction manual of each lens.
65mm
Distance(m)
F4
F5.6
F8
F11
F16
F22
F32
1.0
0.96 - 1.04
0.95 - 1.06
0.92 - 1.09
0.90 - 1.13
0.86 - 1.20
0.82 - 1.30
0.75 - 1.52
1.2
1.14 - 1.27
1.12 - 1.29
1.09 - 1.34
1.05 - 1.40
1.00 - 1.52 0.94 - 1.69
0.85 - 2.08
1.5
1.41 - 1.61
1.37 - 1.66
1.32 - 1.73
1.27 - 1.84
1.19 - 2.06
1.10 - 2.40
0.98 - 3.33
2
1.83 - 2.21
1.77 - 2.30
1.69 - 2.46
1.60 - 2.69
1.46 - 3.20
1.33 - 4.15
1.16 - 8.28
3
2.62 - 3.50
2.50 - 3.76
2.33 - 4.22
2.16 - 4.98
1.91 - 7.16
1.69 - 15.2
1.41 - oo
5
4.01 - 6.63
3.73 - 7.63
3.36 - 9.88
3.00 - 15.7
2.54 - 722
2.15 - oo
1.71 - oo
10
6.67 - 20.1
5.89 - 33.7
5.01 - oo
4.23 - oo
3.36 - oo
2.70 - oo
2.04 - oo
oo
19.0 - oo
13.7 - oo
9.69 - oo
7.10 - oo
4.92 - oo
3.60 - oo
2.50 - oo
Distance (ft)
F4
F5.6
F8
F11
F16
F22
F32
3.5
3.35 - 3.67
3.29 - 3.74
3.21 - 3.85
3.12 - 4.00
2.97 - 4.28
2.81 - 4.68
2.59 - 5.54
4
3.80 - 4.22
3.73 - 4.32
3.62 - 4.48
3.50 - 4.69
3.31 - 5.09
3.11 - 5.67
2.83 - 7.04
5
4.68 - 5.37
4.57 - 5.53
4.40 - 5.80
4.21 - 6.17
3.94 - 6.91
3.65 - 8.09
3.26 - 11.4
7
6.37 - 7.78
6.15 - 8.14
5.85 - 8.75
5.51 - 9.66
5.03 - 11.7
4.55 - 15.8
3.94 - 37.7
10
8.73 - 11.7
8.31 - 12.6
7.75 - 14.2
7.15 - 16.8
6.34 - 24.4
5.59 - 54.4
4.67 - oo
15
12.3 - 19.3
11.4 - 21.9
10.4 - 27.3
9.32 - 39.5
7.96 - 158
6.79 - oo
5.46 - oo
30
20.6 - 55.3
18.3 - 83.8
15.7 - 369
13.4 - oo
10.7 - oo
8.65 - oo
6.57 - oo
oo
63.4 - oo
45.6 - oo
32.1 - oo
23.4 - oo
16.2 - oo
11.9 - oo
8.22 - oo