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Optional strobe attachment balls can be attached to the strobe mounting bases
on the housing or onto the top of the handles.
There are two ways of connecting strobes to the NA-D7100 housing: A) by
optical connection through the Optical Bulkheads; B) by electrical connection
through the Nikonos 5-pins bulkhead.
A)
Using the Optical Bulkheads
The built-in pop-up flash of the D7100 camera can be used as a
commander to send out signals (including i-TTL commands) to the
strobes via the 2 Optical Bulkheads. It can be utilised in different ways
depending on the type of strobes connected to the housing:
A1) Nikon i-TTL compatible strobes such as SB-R200, SB-600, SB-800,
SB-900:
These strobes can fully utilise the Nikon i-TTL controls protocols
enabling individual TTL exposure compensation of each of the 2
strobes connected to the Optical Bulkheads. Do ensure that the other
ends of the optical fibres are pointing onto the light sensor window of
the strobes.
To set the D7100 camera to i-TTL Commander
mode, under Menu, scroll to Custom Setting Menu
(Pencil shaped icon on the left of the LCD screen),
enter ‘e’
Bracketing/flash
.