Nikon os Speedlight SB-102 - Manual (Page 31)

TIPS ON SPEEDLIGHT PHOTOGRAPHY.
1. The flash-to-subject coupling distances and use­
able apertures indicated by the exposure calcula­
tion dial are for dear-water shooting. Therefore,
the correct exposure will be different if the water
is muddy or has floating particles, and some expo­
sure compensation must be made.
2. In shallower depths with natural lighting, overex­
posure may occur when shooting in the automatic
mode. To prevent this, use the smallest aperture
(the numerically largest f-number) possible or turn
off the speedlight and use only natural lighting.
When shooting with the Nikonos-V, the correct
shutter speed for the lighting conditions is dis­
played in the viewfinder. (For more information,
refer to the camera's instruction manual.)
3. When the bracket and arm are attached to the
Nikonos IV-A, certain optical finder models for
older UW-Nikkor 15mm f/2.8 lenses cannot be
attached. It this presents a problem for you,
authorized Nikon dealers and service centers can
perform the necessary modifications.
4. One of the benefits of using a speedlight under­
water is that it restores natural colors to subjects
by removing the water’s bluish cast. Occasionally,
though, you may want to include that bluishness
in your photos. Normally, this is rather difficult to
do because the flash unit renders the background
either too light or too dark. To capture the bluish­
ness, you must eliminate the difference in light
levels between the subject (illuminated by the
speedlight) and the background (illuminated by
natural light)—a difficult task In the manual flash
mode. The easiest way to balance the light levels
is to use the Nikonos-V and the SB-102 in the
TTL automatic mode and follow the procedures
explained In “Daylight Fill-In Flash Photogra­
phy” (page 30).
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