150
A
Aperture, Sensitivity, and Flash Range
Flash range varies with sensitivity (ISO equivalency) and aperture.
Aperture at ISO equivalent of
Approximate range
100
200
400
800 1600 3200 6400 12800
m
ft
1.4
2
2.8
4
5.6
8
11
16
0.7–8.5 2ft 4in.–27ft 10in.
2
2.8
4
5.6
8
11
16
22
0.6–6.0
2ft–19ft 8in.
2.8
4
5.6
8
11
16
22
32
0.6–4.2
2ft–13ft 9in.
4
5.6
8
11
16
22
32
—
0.6–3.0
2ft–9ft 10in.
5.6
8
11
16
22
32
—
—
0.6–2.1
2ft–6ft 10in.
8
11
16
22
32
—
—
—
0.6–1.5
2ft–4ft 11in.
11
16
22
32
—
—
—
—
0.6–1.1
2ft–3ft 7in.
16
22
32
—
—
—
—
—
0.6–0.8
2ft–2ft 7in.
The built-in flash has a minimum range of 0.6 m (2 ft).
In mode
P
, the maximum aperture (minimum f-number) is limited
according to ISO sensitivity, as shown below:
Maximum aperture at ISO equivalent of:
100
200
400
800
1600
3200
6400
12800
2.8
3.5
4
5
5.6
7.1
8
10
If the maximum aperture of the lens is smaller than given above, the
maximum value for aperture will be the maximum aperture of the lens.
A
See Also
See page 153 for information on locking flash value (FV) for a metered
subject before recomposing a photograph.
Menu options relevant to this section are listed below.
•
Custom Setting e1 (
Flash sync speed
)
: Enable or disable auto FP high-
speed sync and choose a flash sync speed (
•
Custom Setting e2 (
Flash shutter speed
)
: Choose the slowest shutter
speed available when using the flash (
•
Custom Setting e3 (
Flash cntrl for built-in flash
)
: Choose a flash control
mode (
