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Using the Built-in Flash
● When using an EX-series Speedlite (→92), press the built-in flash back into the
camera before mounting the external flash.
● When using the built-in flash, keep at least 1 m/3.3 ft away from the subject.
Otherwise the lens barrel may partially obstruct the flash and cause part of the
photo to look dark.
● When using the built-in flash, detach any hood from the lens to keep it from
obstructing flash coverage.
● Using the built-in flash with any of the following lenses can partially obstruct the
flash coverage. Instead, use an EOS-dedicated external flash.
Large-aperture lenses, including the EF16-35mm f/2.8L USM, EF28-70mm
f/2.8L USM.
Super-telephoto lenses, including the EF300mm f/2.8L IS USM and EF600mm
f/4L IS USM.
● The built-in flash can cover the picture area for lenses with focal lengths as
short as 18 mm. If you use a lens shorter than 18 mm, the photo will be dark
around the edges.
● The ‘E’ in E-TTL stands for ‘Evaluative.’
● To retract the built-in flash, press it back down into the camera.
● You cannot use the built-in flash to set high-speed sync (FP flash).
● In < > or < > mode, if you set the shutter speed faster than 1/200 second,
the camera will automatically reset it to 1/200 unless the EX-series Speedlite
has been set for high-speed sync.
● AF flash exposure is always based on the aperture value at the time the shot is
taken, and controlled by E-TTL automatic flash compensation linked to the
active AF point and weighted for the main subject.
● The built-in flash and external flash cannot be used at the same time.
● If the camera finds it difficult to focus, the AF-assist lamp (→39) will light
automatically (except in the < > and < > modes).
● You can disable the AF-assist beam and built-in flash. (C.Fn-5→122)
● You can set the Shutter curtain sync to 2nd-curtain sync. (C.Fn-8-1→124)
● In the aperture-priority AE mode with flash, you can set the sync speed to 1/200
sec fixed. (C.Fn-6-1→124)