FujiFilm IS Pro, Owner'S Manual

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81
Advanced Features —
Photography
Z
Effective range of the built-in flash
The effective range of the built-in flash varies depending on the ISO sensitivity and aperture settings used.
*
The minimum effective range for flash control using the built-in flash is 0.6 meters.
In programmed auto, the maximum aperture (minimum f/-number) is limited according to sensitivity (ISO equivalency), as
shown below:
*
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.
MEMO
i-TTL flash control can adjust for ISO sensitivities between 100 and 1600. It may not be able to adjust flash level appropriately for
ISO sensitivities over 1600.
Aperture at ISO equivalent of:
Metering range
100 125 160 200 250 320 400 500 640 800 1000 1250 1600
1.4 1.6 1.8 2 2.2 2.5 2.8 3.2 3.5 4 4.5 5 5.6 1-7.5m (3.3–24.6 ft.)
2 2.2 2.5 2.8 3.2 3.5 4 4.5 5 5.6 6.3 7.1 8 0.7-5.4m (2.3–17.7 ft.)
2.8 3.2 3.5 4 4.5 5 5.6 6.3 7.1 8 9 10 11 0.6-3.8m (2.0–12.5 ft.)
4 4.5 5 5.6 6.3 7.1 8 9 10 11 13 14 16 0.6-2.7m (2.0–8.9 ft.)
5.6 6.3 7.1 8 9 10 11 13 14 16 18 20 22 0.6-1.9m (2.0–6.2 ft.)
8 9 10 11 13 14 16 18 20 22 25 29 32 0.6-1.4m (2.0–4.6 ft.)
11 13 14 16 18 20 22 25 29 32 — — — 0.6-0.9m (2.0–2.9 ft.)
16 18 20 22 25 29 32 — — — — — — 0.6- 0.7m (2.0–2.3ft.)
Maximum aperture at ISO equivalent of:
100 125 160 200 250 320 400 500 640 800 1000 1250 1600
2.8 3 3.2 3.3 3.5 3.8 4 4.2 4.5 4.8 5 5.3 5.6