Canon 540EZ - Manual (Page 3)

Thank you for purchasing this Canon product.
The Canon Speedlite 540EZ is a high-performance flash unit designed
for use with EOS Series cameras. The 540EZ incorporates a rich selec­
tion of features, including an auto zoom function, TTL automatic flash
exposure control, and powerful light output sufficient for virtually any
shooting situation. When used with an EOS camera, the 540EZ is capa­
ble of everything from simple, automated flash shooting to advanced
techniques such as flash exposure compensation, automatic flash control
based on user-selected shutter speed and/or aperture settings, manual
firing with eight selectable flash output levels, and intricate multiple-flash
lighting setups using EOS multi-flash accessories.
• 540EZ Features
(1) A-TTL Automatic Flash Control
A-TTL automatic flash control stands for Advanced Through The Lens automat­
ic flash control. When used with an EOS camera set to Program AE or Full
Auto mode, the camera and flash unit work together to automatically set the
appropriate aperture and shutter speed for proper flash exposure for indoor and
low-light scenes as well as backlit subjects in daylight.
(2) TTL Automatic Flash Control
TTL automatic flash shooting is possible in other shooting modes such as aper­
ture-priority AE, shutter-priority AE or manual exposure mode When the 540EZ
is combined with aperture-priority AE for an indoor shot or a night scene, the
camera automatically sets a slow shutter speed to properly expose the back­
ground while the flash fires to properly expose the subject.
(3) Three-Zone Flash Metering for Multi-Point Autofocus Systems
When the 540EZ is used with an EOS camera that has multiple focusing points,
the flash automatically weights the exposure in the area of the active focusing
point using the camera's three-zone fiash metering system
(4) Automatic Flash Exposure Confirmation
After a picture is taken using flash, an LED on the back of the flash unit lights
for two seconds to indicate that proper flash exposure was achieved
(5) Auto Zoom
The flash head automatically zooms to set the proper flash coverage angle
according to the lens focal length. Settings from 24mm wide-angle to 105mm
telephoto are possible with the flash alone, and coverage for ultra-wide-angle
lenses down to 18mm is possible using the built-in wide panel The flash cover­
age angle can also be set manually to any desired position