The 540EZ incorporates a rich selection 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 capable 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 automatic flash control When used with an EOS camera set to Program AE or Full Auto mode, the camera and flash unit work together lo automatically set the appropriate aperture and shutter speed for proper flash exposure lor 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-prlority AE for an indoor shot or a night scene, the camera automatically sets a slow shutter speed to properly expose the background while the flash tires 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 flash metering syslem. (4) Automatic Flash Exposure Confirmation After a picture is taken using flash, an LED on the back of the flash unit lights lor two seoonds 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 Nash alone, and coverage for ultra-wide-angle lenses down lo 18mm is possible using Ihe built-in wide panel. The flash coverage angle can also be set manually to any desired position. (6) Flash Exposure Compensation The 540EZ allows the (lash exposure to be adjusted independently of the camera, providing a compensation range ol ±3 stops in 1 /3-stop increments, (7) Manual Flash Control at Eight Output Levels The flash output can be set manually to any of eight power levels, from full (1/1) power lo 1/128 power. (8) Bounce Flash The (lash head can be tilted upward or can be surveled to the right or left tor bouncing the flash OH ot nearby surfaces such as a ceiling or wall to create a softer lighting effect. The flash head can also be tilled 7“ downward lor close-up shots. (9) AF Auxiliary Light Corresponding to Five Focusing Points The built-in AF auxiliary light automatically fires In low-light and low-contrast situations to aid the camera's autofocus system. When combined with the EOS-1 N, the AF auxiliary light emission automatically corresponds to the camera's five autofocusing points. (10) Stroboscopic Flash The 540EZ can be set to automatically fire several flash bursts during a single exposure, creating a stroboscopic effect that records the flow of subject movement. The stroboscopic tiring speed can be freely set lo frequencies as last as 100 bursts per second. (11) Flash Sync Timing The sync timing can he set lo either first-curtain sync, which fires the flash as soon as the shutter Is fully opened, or second-curtain sync, which lires the Hash immediately before the shutter closes. (12) SE (Save Energy) Function When the Hash is set to SE mode, the power automatically turns off after 90 seconds of non-operation in order to conserve battery power. (13) Rich Selection of External Power Supplies Three types of external power supplies are available, including the Compact Battery Pack E. (14) System Accessories for Professional Flash Lighting Techniques Canon's line of dedicated flash accessories include the Off-Camera Shoe Cord 2 for separating the (lash trom the camera, as well as adapters and cords for configuring elaborate multiple-flash setups. Even when using more than one Hash, the flash exposure can be controlled automatically by the EOS TTL system. ♦ The instructions in this manual assume use with the EOS-1 N camera. ♦ Flash functions and the information displayed in the LCD panel may differ when used with other EOS cameras. ♦ When the 540EZ is used with a camera set to Full-Auto mode or a Programmed Image Control (PIC) mode, all Hash functions are controlled by the camera and function settings on the Hash unit itself are canceled. Precautions Contents (1) The 540EZ contains high-voltage circuits. Do not attempt to disassemble the flash unit yourself. Always lake if to an authorized Canon service facility for repair. (2) The 540EZ is...