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Taking Photographs—Exposure
Flexible Program
In programmed auto, different com bi na tions of shutter
speed and ap er ture can be selected by rotating the main
com mand dial (“fl exible program”). All combinations
pro duce the same ex po sure. While fl exible program is
in effect, an asterisk (“*”) appears next to the exposure-
mode indicator in the top control panel. To restore
de fault shut ter speed and aperture settings, rotate the main com mand dial until the
indicator is no longer dis played. Default settings can also be re stored by turning the
cam era off, selecting another exposure mode, per form ing a two-but ton re set (
128), or choosing another setting for Custom Setting b3 (EV step; 184).
Exposure Program
The exposure program for programmed auto is shown in the fol low ing graph:
ISO 200; lens with maximum aperture of f/1.4 and mini-
mum aperture of f/16 (e.g., AF 50 mm f/1.4 D)
Aperture
Shutter speed
The maximum and minimum values for EV vary with sen si tiv i ty (ISO equivalency); the
above graph assumes a sen si tiv i ty of ISO 200 equivalent. When matrix metering is
used, values over 17
1
/
3 EV are re duced to 17
1
/
3 EV.
-4
-3
12
13
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
F1.4
F1
F2
F2.8
F4
F5.6
F8
F11
F16
F22
F32
30" 15"
8"
4" 2" 1" 2 4 8 15 30 60
125 250 500
1000
2000 4000
8000
22
21
20
19
18
17
16
15
14
[
EV
]
23
1
7
1
/
3