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12. AF-Assist Beam
| In |
| Speedlite emits the |
| automatically to assist autofocusing. The |
| |
| AF of all EOS cameras. The |
| beam is effective with 28mm and longer |
| lenses. Its effective range in darkness is |
| indicated in the table below. See page |
| 123 for details on when the |
| beam is emitted. |
Position | Effective Range |
Center | Approx. 0.6 - 10 m / 2 - 33 ft. |
Periphery | Approx. 0.6 - 5 m / 2 - 16.4 ft. |
Automatic Reversion to Default Settings
When Speedlite 550EX is attached to an
EOS camera equipped with a < >
button, pressing the < > button resets the Speedlite’s settings (except the Custom Functions) to its default settings
As a Normal |
| |
(All related settings are canceled.) | ||
Speedlite | ||
| ||
Auto zoom | ||
| ||
|
| |
| ||
As a | (All related settings are canceled.) | |
Wireless |
| |
Master |
| |
Master flash ON | ||
Unit | ||
| ||
| No flash ratio setting | |
|
|
*With the
22