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Canon cameras share some common features, giving the system a cohesiveness that any
great camera line must have, especially when it’s the leader of the pack. Although some of
the controls may look diff erent, or be placed in other locations, anyone who’s enjoyed one EOS
machine can become totally familiar with another EOS model in just a few minutes.
Power Switch
All prosumer and professional Canon cameras have a two-stepped power switch (the Rebel does not). To
power the camera up, raise the toggle to either the fi rst or second position. On prosumer EOS bodies, the
fi rst position is a general “on” switch with the Quick Control Dial disabled. The second on position will allow
you to make exposure setting adjustments. Because the Quick Control Dial is so close to where you may
have your thumb when shooting, it’s possible to nudge the dial inadvertently. When shooting in Program,
Aperture Priority or Shutter Priority, this adjusts your exposure compensation. In Manual, this dial controls
aperture. With the dial turned on, it would be possible to throw off the exposure without realizing it, so it’s
a good idea to keep the power switch in the fi rst position until you want to make adjustments
On most EOS-1 bodies, the second power switch only powers the audible
signal. On the EOS-1 bodies prior to the 1D Mark III, there is an additional
switch, the Quick Control Dial Switch, located in 11 o’clock position just
above and to the left of the Quick Control Dial. You may make exposure
and vertical focus point adjustments only when this switch is active,
however even when turned off , the Quick Control Dial will work for
scrolling through the menu or moving around within an enlarged image
you are reviewing .
The Main Dial
The Main Dial is located just behind the shutter button on the cameraright
side. You will use this wheel to change Focus Points, make Exposure
Compensation adjustments, change ISO, and to control many more
EOS-1 bodies have an extra Main Dial (with its own on/off switch), along
with an additional FEL button and shutter release, located under the
camera’s right side grip. Called the Vertical Grip Dial, this extra dial allows
the photographer to control everything while holding the camera in a
vertical position. If you’ve never had a camera with this feature it may
take a little getting used to, but once you do you’ll wonder how you ever
got by without it
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