Nikon Speedlight SB-600 - Manual (Page 75)

75
Adv
anced oper
ations
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Setting the aperture
Calculate the aperture by using this equation and table. To ensure the correct
exposure, use an aperture smaller than the one obtained from the equation.
ISO sensitivity 25 50 100 200 400 800 1000
Coefficient (m/ft) 1.4/4.6 2/6.6 2/6.6 4/13 4/13 5.6/18 5.6/18
For example, at an ISO sensitivity of 100 with a subject 0.5 m (1.6 ft.) away and
the wide-flash adapter in place, the suggested aperture is:
Therefore, you should use at least f/4 or an even smaller aperture, such as
f/5.6 or f/8.
u When shooting subjects closer than 0.6 m (2 ft.)
With the SB-600 attached to the camera, sufficient illumination of the subject
cannot be obtained. In this case, use the SB-600 off-camera by attaching the
optional TTL Remote Cord as shown below.
• In
Do flash operation where Monitor Preflashes are fired, when the SB-600 is used
with D/G-type CPU lenses, you may not be able to get the correct exposure, because
distance information from the lens is used. In this case, position the camera (A) and the
SB-600 (B) at equal distances from the subject.
• For F5 cameras with the High-Magnification Finder DW-30 or DW-31, or F4 cameras with
the High-Magnification Finder DW-20 or DW-21, use the optional TTL Remote Cord
SC-24 instead of the SC-17.
f/stop
≥ 2 ÷ 0.5 = 4 (in meters)
f/stop
≥ 6.6 ÷ 1.6 = approx. 4 (in feet)
f/stop
≥ Coefficient ÷ Flash-to-subject distance
A
B
Use either the SC-29, SC-28 or SC-17.