147
l
A
Aperture, Sensitivity, and Flash Range
Flash range varies with sensitivity (ISO equivalency) and aperture.
Aperture at ISO equivalent of
Range
100
200
400
800
1600
3200
6400
m
ft
1.4
2
2.8
4
5.6
8
11
0.7–8.5
2ft 4in.–27ft 11in.
2
2.8
4
5.6
8
11
16
0.6–6.0
2ft–19ft 8in.
2.8
4
5.6
8
11
16
22
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 11in.
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
2.8
3.5
4
5
5.6
7.1
8
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 149 for information on locking flash value (FV) for a metered subject before
recomposing a photograph.
For information on auto FP high-speed sync and choosing a flash sync speed, see Custom
Setting e1 (
Flash sync speed
234). For information on choosing the slowest shutter
speed available when using the flash, see Custom Setting e2 (
Flash shutter speed
,
For information on flash control and using the built-in flash in commander mode, see
Custom Setting e3 (
Flash cntrl for built-in flash
See page 292 for information on using optional flash units.
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