4. Press the center Multi-selector
button again. This sets the flash
level and highlights the frequency
setting. Set the frequency to how
many times you want the flash to
fire per second.
5. Press the center Multi-selector
button again. This sets the fre-
quency and highlights the setting
for the number of flashes per
frame. Set this by pressing the cen-
ter of the multi-selector again.
6. Figure out the proper aperture
using the GN ÷ D = Aperture.
For more on using and under-
standing the GN ÷ D = Aperture
formula, see Chapter 3.
7. When the proper exposure is
determined, make sure the
aperture setting on the flash
and camera are the same. If they
aren’t set the same, the exposure
won’t be correct.
8. Set your shutter speed. Your
shutter speed depends on the fre-
quency of the flash and the repeat
rate. You figure this out by doing a
little math. Your shutter speed is
equal to the number of flashes per
frame divided by the frequency.
Sound confusing? It’s really not.
Say you set the frequency to 5 Hz,
and you want the flash to fire 20
times in a single frame, you divide
20 by 5. So you need a 4-second
shutter speed.
9. Check the ready light and then
shoot the photo.
Any overlapping images will be
overexposed if the flash expo-
sure is correct. To prevent this,
underexpose the image by
reducing the aperture by one
stop.
Setting Up for theCreative LightingSystem
This part is where you get into the tech stuff:
How to set up your Speedlight as a wireless
remote flash (slave); how to adjust the
exposure to suit your needs; setting up
groups of lights; and so on. You are no
doubt beginning to see just how versatile
and powerful a tool the CLS can be. The
only limit is your imagination.
You can control an infinite amount of
flashes (if you can afford to buy them) all
from your camera. You don’t even need to
have a light meter, the camera meters for
you. If you don’t like the way the light looks,
you can change it without having to walk
across the room to a power pack. This is all
very convenient.

Commander

The first thing you need to do when setting
out to use the CLS wirelessly is set up a
commander unit also known as a master
flash. The master flash is what controls all of
the wireless slaves and tells them what to
do. The master can be an SB-800, SU-800,
or the built-in Speedlight on your
D70/D70s, D80, or D200 camera.
For information on setting up a
commander unit see Chapter 4

Wireless remote flash

The wireless remote flash is main advantage
of CLS. It’s all about getting the flash off of
your camera. By doing this, you are able to
control the light in a much better way. You
don’t have to have full frontal light. You can
Tip
34 Part I ✦Using the Creative Lighting System
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