Nikon SB-16 instruction manual Unit·mtt

-CONTROLS IN DETAIL-continued----------

Now, you are ready to read the usable f/stop from the dial. Each color-coded line indicating the auto shooting range for each f/stop has a notch on it. Find the notch directly above the flash-to-subject distance and read the f-number at the end of the line.

Example

With ASAIISO 100, zoom head set at N for 35mm lens, a subject 2m (6 .6 ft.} away, the aperture is approx. f/4. With a subject 4m (13 ft.) away, the aperture is f12.

Without referring to the exposure calculator dial, you can also determine the f/stop by using the guide number equation found on page 30.

The guide number at various film speeds and zoom head settings is shown in the following table:

Guide numbers in the MD mode						Unit·m(tt)
Zoom head			ASAIISO film speed
setting	800	400	200	100	50	25

T 30(98) 21 (69) 14 (46) 10 (33) 7 (23) 5 (16)

527 (89) 19 (62) 13 (43) 9.5 (31) 6.7 (22) 4.7 (15)

N22(72) 16 (52) 11 (36) 8 (26) 5.6 (18) 4 (13)

W, 19 (62) 13 (43) 9.5 (31) 6.7 (22) 4.8 (16) 3.3(11)

W2' 12 (39) 8.4 (28) 5.9(19) 4.2 (14) 3 (98) 2.1 (6.9)

•W2is used when the wide· flash adapter is attached to the flash unit with the zoom head set at W,.

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