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Flash Photography with Speedlite 550EX
High-Speed Sync (FP Flash)
When the Speedlite 550EX is set to the high-speed sync mode (
), it can
synchronize at all shutter speeds, even those faster than 1/250 sec. When
high-speed sync is enabled,
is displayed in the viewfinder to indicate
high-speed sync.
High-speed sync is effective in the following cases:
(1) When you want to use fill flash for a portrait and maintain
background blur with a large aperture.
(2) When you want to produce a catchlight in the subject's eyes.
(3) When you want to use fill flash to eliminate shadows
With conventional flash.
With FP flash.
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