Nikon os Speedlight SB-102 - Manual (Page 4)

FOREWORD
The Nikonos Speedlight SB-102, an amphibious high­
performance electronic flash unit with a silicon-con­
trolled rectifier and series circuitry, is designed for use
with the Nikonos-V, Nikonos IV-A, and Nikonos III. The
SB-102 can be submerged to a depth of 50 meters
(160 feet) and withstand pressure of up to 6kg/cm^
(85 Ib/in^), enabling it to be used in environments where
regular speedlights could not be taken.
In combination with the Nikonos-V, the SB-102 features
automatic through-the-lens (TTL) flash exposure con­
trol. This means the silicon photodiode (SPD) in the
Nikonos-V’s shutter box reads the light passing through
the lens and then automatically signals the speedlight
to turn itself off when the exposure is correct. Because
TTL flash offers a wide range of useable apertures and
shooting distances, depth of field is easy to control and
shooting as close as 0.3 m (1 ft) is possible.
With the optional Sensor Unit SU-101, the SB-102 can
be used for non-TTL automatic flash photography in
combination with the Nikonos-V, Nikonos IV-A, and
Nikonos III. In this mode, flash output is automatically
controlled by the SU-101.
This speedlight has the same area of coverage as a
28mm lens. When the Wide-Flash Adapter SW-102
(provided) is used, the area of coverage increases to
that of a 15mm lens.
The SB-102 also features manual control with three
power settings (“FULL," “M1/4,” and “M1/16”), slave
firing capability for wireless multiple flash photography,
and a target-light for close-up shooting. The target-light,
positioned in the center of the flash head, shoofs a
beam of light at the subject to help you aim the flash
head at the subject. In addition to the equipment men­
tioned, a variety of optional accessories is available to
increase the versatility of the SB-102.
Even though this speedlight is extremely easy to oper­
ate, you should still familiarize yourself wifh the pre­
paratory steps and basic operations explained in the
first two sections of this manual. For more detailed
information, refer to “CONTROLS IN DETAIL” and
“TIPS ON FLASH PHOTOGRAPHY A few minutes
wisely invested now will pay off later in years of reward­
ing photographic experiences.
PREPARATION
STOP! READ THIS NOTICE BEFORE USING YOUR SB-102. THE 0-RING SEALS
MUST BE EXAMINED AND LUBRICATED BEFORE USE TO AVOID DAMAGING
THE SPEEDLIGHT.
This Nikonos Speedlight SB-102 uses 0-rings to seal
and waterproof the junctions between parts. Your
Nikonos Speedlight SB-102 should not be considered
waterproof until you have examined the user-service­
able 0-rings (one each for the battery chamber cap®,
the sync cord's ® camera and speedlight plugs, and
the synchro socket and sensor socket covers (|) @).
They must be in perfect, undamaged condition and
properly lubricated prior to each use. Read the follow­
ing instructions thoroughly to familiarize yourself wifh
the maintenance of fhe 0-rings.
Because fhe outer surface of your Nikonos Speedlight
SB-102 has been specially treated to make it water­
proof, it must be protected from impacf. If it becomes
damaged, send it to a qualified technician for service
before the next use.
Your Nikonos Speedlight SB-102 is watertight only when
In perfectly serviced condition, when all 0-ring seals
are in perfect condition, and when all components are
properly assembled and closed.
Pay special attention to the instructions for installing
the O-rings because they are what make the Nikonos
Speedlight SB-102 watertight. For the O-rings to per­
form properly, fhey must be in perfect condition (with
no cuts, tears, or other imperfections) and properly
lubricated. If fhey are nof, they will not perform properly
and may allow water to enter your flash unif. To prevent
the accidental use of a defective 0-ring, always discard
old rings.
The channels into which the O-rings fit must be free of
anyforeign matter and in their original, smoothly finished
condition. If they are not, the O-rings will not seat pro­
perly and may allow water to enter your flash unit. If any
channel in your Nikonos Speedlight SB-102 becomes
damaged, send the unit to a qualified technician for
service before the next use.
Your Nikonos Speedlight SB-102 contains a series of
O-rings. Some are factory-installed and cannot be
serviced by you. Once each year, send your fiash unit
to a qualified technician so that these O-rings can be
serviced. Do not attempt to disassemble the unit and
service these O-rings yourself.
All of the O-rings in your Nikonos Speedlight SB-102
that can be serviced by you must be examined at the
end of each dive day and, if possible, after each dive.