195 a – Nikon D810 User Manual
Page 219
195
A
See Also
See page 198 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, 0 329). For
information on choosing the slowest shutter speed available when
using the flash, see Custom Setting e2 (Flash shutter speed, 0 331).
For information on flash control and using the built-in flash in
commander mode, see Custom Setting e3 (Flash cntrl for built-in
flash, 0 331).
See page 428 for information on using optional flash units.
A
Aperture, Sensitivity, and Flash Range
Flash range varies with sensitivity (ISO equivalency) and aperture.
Maximum aperture at ISO equivalent of
Range
64 100 200 400 800 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.
1.6
2
2.8
4
5.6
8
11
16
22
0.6–6.0
2ft–19ft 8in.
2.2
2.8
4
5.6
8
11
16
22
32
0.6–4.2
2ft–13ft 9in.
3.2
4
5.6
8
11
16
22
32
—
0.6–3.0
2ft–9ft 10in.
4.5
5.6
8
11
16
22
32
—
—
0.6–2.1
2ft–6ft 10in.
6.3
8
11
16
22
32
—
—
—
0.6–1.5
2ft–4ft 11in.
9
11
16
22
32
—
—
—
—
0.6–1.1
2ft–3ft 7in.
13
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 exposure mode e, the maximum aperture (minimum f-number) is
limited according to ISO sensitivity, as shown below:
Maximum aperture at ISO equivalent of:
64
100
200
400
800
1600
3200
6400
12800
2.5
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.