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E-TTL : FP Sync
San Gregorio, 13h30 [EF 135mm f/2L USM, 1/2000s at f/2,8]
The flash can synchronize at all shutter speeds.
Just select the high-speed sync (FP flash) mode with EX Speedlites. With the sync speed set to the maximum (varies according to the EOS camera in use) or slower, a normal flash is fired. Setting a faster sync speed will switch the Speedlite to fine the flat flash at a rate of approximately 50 khz. High-speed sync (FP flash) can be easily set up to the maximum shutter speed of the camera.
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FP Flash - Shutter Curtain
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With FP flash, producing background blur is easy.
As shown in the left photo, fill flash is an effective technique for outdoor portraits when the background is bright. However, with most conventional Speedlites, the flash sync speed cannot be faster than the X-sync speed due to the limitations of the single-lens reflex's focal-plane shutter. Thus, when fill flash is used, the aperture must be stopped down to compensate. This makes the background less blurred. With EX Speedlites, the flash aperture and sync speed can be set freely. With a fully open aperture, the background was blurred enough to make the girl stand out with the "it's delicious" look on her face. |
Part of Canon "Flash Work" / E-Version © by Daniel ROCHA
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