Aperture, Sensitivity, And Flash Range - Nikon D90 User Manual

Aperture, Sensitivity, and Flash Range

Flash range varies with sensitivity (ISO equivalency) and aperture.
Aperture at ISO equivalent of
200 400
1.4 2
2 2.8
2.8 4
4 5.6
5.6 8
8 11
11 16
16 22
22 32
In the following modes, the maximum aperture (minimum f-number) is limited
according to ISO sensitivity when the built-in flash is used:
Mode
P, i, k, o
n
For each one-step increase in sensitivity (e.g., from 200 to 400), aperture is stopped
down by half an f/-stop. 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.
n
266
800 1600
2.8 4
4 5.6
5.6 8
8 11
11 16
16 22
22 32
32 —
— —
Maximum aperture at ISO sensitivity of
200 400
2.8 3.3
5.6 6.7
3200 m
5.6 1.0–12
8 0.7–8.5
11 0.6–6.1
16 0.6–4.2
22 0.6–3.0
32 0.6–2.1
— 0.6–1.5
— 0.6–1.1
— 0.6–0.8
800
4
8
Range
ft.
3ft. 3in.–39ft. 4in.
2ft. 4in.–27ft. 11in.
2ft.–20ft.
2ft.–13ft. 9in.
2ft.–9ft. 10in.
2ft.–6ft. 11in.
2ft.–4ft. 11in.
2ft.–3ft. 7in.
2ft.–2ft. 7in.
1600 3200
4.8 5.6
9.5 11