1. Flash Photography with Speedlite 550EX

With Speedlite 550EX attached to the EOS-3, flash photography is as easy as any AE mode. You can also use the following features:

(1) E-TTL Autoflash

With E-TTL autoflash (preflash evaluative metering), optimum flash exposure can be obtained for the subject in focus. In the aperture-priority AE mode, a slow sync speed is set automatically in low-light situations to obtain a natural-looking, balanced exposure between the subject and background.

(2) High-Speed Sync (FP Flash)

High-speed sync (FP or focal-plane flash) enables flash synchronization with all shutter speeds from 30 sec. to 1/8000 sec.

(3) FE (Flash Exposure) Lock

FE lock obtains and locks the correct flash exposure for any part of the subject. This is the flash equivalent of AE lock.

(4) Flash Exposure Compensation

Like normal exposure compensation, flash exposure compensation can be used to set the flash output up to ±3 stops in 1/3-stop increments.

(5) FEB (Flash Exposure Bracketing)

As with AEB (autoexposure bracketing), flash exposures can also be bracketed up to ±3 stops in 1/3-stop increments.

(6) Wireless Multi-flash E-TTL

For sophisticated lighting effects, multiple wireless Speedlites can be used for E-TTL autoflash. All features (1) to (5) above can be used. The operation is as simple as using a Speedlite directly attached to the camera.

E-TTL is an abbreviation for Evaluative-Through-The-Lens.

With autofocus, the flash exposure is always based on the aperture (set automatically or manually) and autoflash metering is weighted at the current focusing point.

When it is difficult to autofocus, the 550EX’s built-in AF-assist beam is emitted automatically. The beam is linked to the area AF.

92

Page 92
Image 92
Canon EOS-3 manual Flash Photography with Speedlite 550EX, High-Speed Sync FP Flash, FE Flash Exposure Lock