166
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.
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
For information on:
•
Locking flash value for a metered subject before recomposing a
photograph, see “FV Lock” (
169).
•
Enabling or disabling auto FP high-speed sync and choosing a flash
sync speed, see
A
> Custom Setting e1 (
Flash sync speed
•
Choosing the slowest shutter speed available when using the flash,
see
A
> Custom Setting e2 (
Flash shutter speed
,
265).
Summary of Contents for D7500
Page 354: ...328 A Certificates ...
