Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 246)

Caution
Defocused image areas may be incomplete when shooting near maximum aperture
at high shutter speeds, depending on shooting conditions. If you dislike the
appearance of defocused image areas, shooting as follows may give better results.
• Shoot with an option other than [ Elec. 1st-curtain ].
• Lower the shutter speed.
• Increase the aperture value.
Precautions when set to [Electronic]
Be responsible when using electronic shutter, and respect subject privacy and
portrait rights.
Some restrictions on shutter speed apply. Shutter speeds slower than 0.5 sec. are
not available.
The continuous shooting speed may become slower depending on the shooting
conditions.
In shots of fast-moving subjects, the subject may be distorted, or in continuous
shooting with Servo AF, shots may be out of focus.
With some lenses and under some shooting conditions, lens focusing and aperture
adjustment may be audible.
Bands of light may be displayed and captured images may be affected by light and
dark banding if you shoot with electronic shutter during flash firing by other
cameras or under fluorescent lighting or other flickering light sources.
Zooming during continuous shooting may cause changes in exposure even at the
same f/number. For details, refer to the Canon website.
[
Elec. 1st-curtain ] is used for bulb exposures.
AEB shooting and flash photography are not available.
Some functions will be restricted, but you can return to shooting with previous
settings by switching to a setting other than [
Electronic ] or switching to viewfinder
shooting.
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