Nikon SB-600 user manual Iso

Flash shooting in the 1/300 TTL High-Speed Flash sync mode (F5 only)

Use the guide number table and equation to calculate the farthest flash shooting distance, according to each zoom-head position.

D (farthest flash shooting distance)

= Guide number ÷ f/stop (aperture)

Guide number (m/ft.) in the 1/300 TTL High-Speed Flash sync mode

ISO			Zoom-head position (mm)
sensitivity	14*	24	28	35	50	70	85
25	2.9/9.5	4.7/15	5.1/17	5.6/18	6.6/22	7.3/24	8/26
50	4.0/13	6.7/22	7.2/24	8/26	9.3/31	10.3/34	11.4/37
100	5.7/19	9.4/31	10.1/33	11.3/37	13.1/43	14.5/48	16/52
200	8/26	13.2/43	14.1/46	15.8/52	18.3/60	20/66	22.4/73
400	11.4/37	18.8/62	20.2/66	22.6/74	26.2/86	29/95	32/105
800	16/52	26.3/86	28.3/93	31.6/104	36.7/120	40.6/133	44.8/147

*With the wide-flash adapter in place

•For example, when shooting with an ISO sensitivity of 100, at a 35mm zoom-head position and an aperture of f/5.6:

D = 11.3 ÷ 5.6 (f/stop) = 2.0 (in meters) (farthest flash shooting distance)

D = 37 ÷ 5.6 (f/stop) = 6.6 (in feet) (farthest flash shooting distance)

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