This kit is identical to the R1C1 Wireless Close-up Speedlight System,
except it does not include the SU-80 Speedlight Commander. You would
only want this commander if you did not already have the SB-800
Speedlight (or if you wanted to use the SB-800 somewhere else and you
did not want to buy another one) and/or the camera does not have a
Nikon commander mode for its built-in flash. The Nikon D70/D70s
commander modes are not as powerful as the SU-80. Some people here have
noted that the D70/D70s built-in flash cannot be used to contribute
light when it is in commander mode, but that is not true. Although not
documented in the manual, you can use the flash lock function to make
the flash fire when in commander mode.

R1 Wireless Close-up is a bit of a misnomer, as this kit's utility goes
far beyond mere close-ups. In fact, it is not even a complete close-up
kit if you are using the 60mm f/2.8 micro-Nikkor. You will still need
the UR-5 adaptor ring if you want to mount the Speedlight ring on the
front of the lens and still focus as closely as possible. Otherwise,
the included 62mm adaptor works just fine on this lens. The UR-5 is
unnecessary on any of the other micro-Nikkors. The kit includes a set
of five adaptor rings in 52mm, 62mm, 67mm, 72mm and 77mm sizes.

The SB-R200 Speedlights can be used as remotes only. They cannot even
be mounted on a flash shoe without an adaptor. The kit includes
adaptors for mounting the SB-R200s on standard tripod screws, flash
brackets, and just setting them on a table. The SB-R200s may also be
used handheld, either by the model, assistants, or the photographer.
This can be useful in close-up photography, for example, when you might
want to light a subject from below or to the side. The SB-R200s use
CR123A lithium batteries (as does the SU-80). Nikon does not seem to
like standard AA batteries, considering them to be too weak and having
too short a life to be truly useful.

The kit also includes two close-up diffuser adaptors for the SB-R200s.
These work very well in eliminating harsh shadows, as does the included
diffuser sheet.

Controls include two dials for channel and group, an ON/OFF switch, and
test flash button. That is it. The system is very simple to use. The
manuals and examples, unfortunately, all assume that the remotes are
being controlled by the SU-80, so you will have to dig around your
other manuals to figure out how to use the SB-800 or internal flash of
your camera as a commander. The strobes also have connectors for wired
control in the event that the flash is out of range or oriented in such
a way that it cannot read the commander. I could want a little more
travel for the tilt heads on these units. It would be very nice if the
flash mount would fold flat against the sensor for storage and
protection.

Even though the built-in flash is not supposed to contribute light to a
scene when it is in commander mode, it can, especially in close-up
photography. A light shield which fits on the flash shoe and blocks the
flash is included for this reason (the shield does not block the
commander signals).

The Advanced Wireless System used by this system allows the strobes to
be placed in three groups, each with their own exposure adjustments or
even set to manual. Each group is practically limited to three strobes
(otherwise all the light is too bright for them to read properly), but
there is no actual limit. You could have a hundred strobes in each
group if you wanted.

As with any flash system, you should not abuse it by repeatedly firing
it before it is fully charged, as this is a good way to cause it to
overheat.

If you already have an SB-800 flash or a Nikon built-in flash and are
considering additional strobes such as the SB-600 or another SB-800,
this kit is worth a look. These smaller strobes pack easily (they come
with their own pouches) and are really all you would need for many
applications.