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A Aperture, Sensitivity, and Flash Range
The range of the built-in flash varies with sensitivity (ISO equivalency)
and aperture.
Aperture at ISO equivalent of Range
200 400 800 1600 3200 m ft.
1.4 2 2.8 4 5.6 1.0–12.0 3ft. 3in.–39ft. 4in.
2 2.8 4 5.6 8 0.7–8.5 2ft. 4in.–27ft. 11in.
2.8 4 5.6 8 11 0.6–6.1 2ft.–20ft.
4 5.6 8 11 16 0.6–4.2 2ft.–13ft. 9in.
5.6 8 11 16 22 0.6–3.0 2ft.–9ft. 10in.
8 11 16 22 32 0.6–2.1 2ft.–6ft. 11in.
11 16 22 32 — 0.6–1.5 2ft.–4ft. 11in.
16 22 32 — — 0.6–1.1 2ft.–3ft. 7in.
22 32 — — — 0.6–0.8 2ft.–2ft. 7in.
The built-in flash has a minimum range of 0.6 m (2 ft.).
In programmed auto exposure mode (mode e), the maximum aperture
(minimum f-number) is limited according to ISO sensitivity, as shown
below:
Maximum aperture at ISO equivalent of:
200
400 800 1600 3200
3.54 55.67.1
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.