Nikon SB-28 instruction manual Specifications, ISO film speed

Specifications

ISO film speed							Shooting distance range (in feet)
1600*1	800*2	400	200	100	50	25	18mm	20mm	24mm	28mm	35mm	50mm	70mm	85mm
2.8	2	1.4					7.4–66	8.2–66	13–66	14–66	15–66	18–66	20–66	21–66
4	2.8	2	1.4				5.3–59	5.8–65	8.7–66	9.3–66	11–66	13–66	14–66	15–66
5.6	4	2.8	2	1.4			3.7–41	4.1–46	6.2–66	6.6–66	7.4–66	8.7–66	9.9–66	11–66
8	5.6	4	2.8	2	1.4		2.6–29	2.9–32	4.4–49	4.7–52	5.2–59	6.1–66	7.0–66	7.2–66
11	8	5.6	4	2.8	2	1.4	2.0-20	2.1–23	3.1–34	3.3–37	3.7–41	4.3–48	4.9–55	5.1–57
16	11	8	5.6	4	2.8	2	2.0–14	2.0–16	2.2–24	2.4–26	2.6–29	3.0–34	3.5–39	3.6–41
22	16	11	8	5.6	4	2.8	2.0–10	2.0–11	2.0–17	2.0–18	2.0–20	2.2–24	2.5–27	2.6–28
32	22	16	11	8	5.6	4	2.0–7.3	2.0–8.2	2.0–12	2.0–13	2.0–14	2.0–17	2.0–19	2.0–20
	32	22	16	11	8	5.6	2.0–5.2	2.0–5.7	2.0–8.6	2.0–9.2	2.0–10	2.0–12	2.0–13	2.0–14
		32	22	16	11	8	2.0–3.6	2.0–4.1	2.0–6.1	2.0–6.5	2.0–7.3	2.0–8.6	2.0–9.8	2.0–10
			32	22	16	11	2.0–2.6	2.0–2.8	2.0–4.3	2.0–4.6	2.0–5.2	2.0–6.0	2.0–6.9	2.0–7.2
				32	22	16	2.0	2.0–2.0	2.0–3.0	2.0–3.2	2.0–3.6	2.0–4.3	2.0–4.9	2.0–5.1

: Programmed TTL Auto Flash with Nikon F-501/N2020, F-401s/N4004s, F-401/N4004 and F-301/N2000. (ISO 25 to ISO 400 for F-401s/N4004s, F-401/N4004)

: Non-TTL Auto Flash mode

*1: TTL Auto Flash t operation is not possible at this film speed.

*2: TTL Auto Flash t is possible for cameras in Groups1to 4and F-501/N2020 and F-301/N2000. For ISO 1000, use an aperture 1/3 of an f/stop smaller than the aperture for ISO 1600.

•Usable apertures in the TTL Auto Flash t mode are f/1.4 to f/32, and the usable shooting distance range is 2.0 to 66 ft.

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