Canon EOS-1D X EOS-1D Instructions - Page 107
E-TTL Autoflash, E-TTL Autoflash in Other Shooting Modes
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Flash Photography with Speedlite 550EX E-TTL Autoflash Using E-TTL autoflash in the < > Program AE mode is described below. For details on using Speedlite 550EX, see the instructions booklet that came with it. 1 Set the camera's shooting mode to < >. 2 Check that the 550EX's pilot lamp is lit. 3 Focus the subject. 4 •Take the picture. Make sure the flash-ready indicator < > is on, and check the shutter speed and aperture before taking the picture. E-TTL Autoflash in Other Shooting Modes Even in the < >, < >, and < > modes, E-TTL autoflash is as easy as normal picture- taking without flash. 6 (1) When you press the shutter button halfway, the shutter speed and aperture are set by the camera as with normal picture-taking without flash. Mode Shutter Speed Setting Flash Aperture Setting (Shutter-priority AE) Manual (30 sec. - 1/500 sec.) Auto (Aperture-priority AE) Auto (30 sec. - 1/500 sec.) Manual (Manual) Manual (30 sec. - 1/500 sec.) Manual ∗ Since using the < > mode in low light will result in a slow shutter speed, use a tripod to prevent camera shake. (2) When you press the shutter button fully, preflash evaluative metering based on the aperture set in (1) is used for the E-TTL autoflash exposure. (3) The background exposure is set by the shutter speed and aperture combination. Flash Photography 107