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In the photo on the right, the spot metering
function was used to determine the exposure.
The resulting image was brightly lit, but lacked
the vivid detail the photographer was striving
to attain. Moreover, the image failed to capture
the atmosphere of the old town in the background,
which was overexposed.
The main photograph was captured by taking advantage
of the automatic flash exposure control of E-TTL
II. This intelligent feature eliminated the
dramatic exposure gap and captured both the
angel and piazza with a clarity that matched
the photographer's aspirations. |
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Your range of photographic expression expands exponentially when using an external flash unit as the main or auxiliary light source. For example, subjects can easily be captured against reflective backgrounds at the ideal exposure. Or you can highlight subject details without adjusting exposure to compensate for the background.
Fully automatic functions available in EX Series Speedlite flash units provide all the benefits of professional exposure and light control techniques. When mounted on an EOS camera, a Speedlite automatically receives information such as the lens focal length, exposure control mode and aperture. It then makes adjustments accordingly, working together with the camera as an integrated unit to achieve the most natural possible exposure. When photographers use a Speedlite, they reap the rewards of sophisticated flash photography with the press of a shutter button. |
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E-TTL II is Canon's latest proprietary automatic flash exposure control system. By employing multiple metering zones to measure both ambient light and preflash, then comparing the two and taking metering distances into account, this sophisticated system automatically adjusts the flash level to achieve natural reproduction with ideal exposure of both the background and subject.
In various shooting situations, even when the background is highly reflective, E-TTL II can use distance information from the lens to eliminate underexposure and achieve optimal automatic flash exposure control. |
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When an EX Series Speedlite is mounted on an EOS DIGITAL camera, it automatically informs the camera of the color temperature of its illumination. This enables the camera to calculate white balance with extreme accuracy.
* White balance must be set to "automatic" or "flash use" mode. |
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| The angle of view of an EOS DIGITAL camera is different depending on the size of its image sensor (APS-C, APS-H, or 35mm full-size), regardless of the focal length of the lens being used. This factor is taken into account by EX Series Speedlites, which automatically adjust the flash zoom mechanism depending on your camera's image sensor size to deliver an ideal flash angle for the effective angle of view. Since only necessary areas of the scene are illuminated, Speedlites are especially efficient at conserving energy. |
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