Nikon D300s, D300S (Body Only) user manual 174, Aperture, Sensitivity, and Flash Range

AAperture, 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
3.5	4	5	5.6	7.1

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.

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