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Watt? Me Worry?

Whether you’ll use a built-in flash (found on the Rebel and 30D) or an accessory Speedlite, Canon has paid a great deal of attention to how that equipment interacts with their cameras. In the earlier days of Canon’s digital photography, early Rebels, D30, D60, 10D, and 20D models, even the 1Ds, there were significant problems with E-TTL, Canon’s through-the-lens flash metering system, that garnered less than rave reviews from many photographers. The problem was that the output power of the flash was tied to the final position of the focus point, so that if you focused, held the shutter halfway down and recomposed the image, the ...

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