Canon 80D Experience Manual page 24

Canon 80D Experience
you set and retain the aperture or shutter speed setting you desire. But because
you may not want the camera to automatically select an excessively high ISO
setting in these situations, you will be able to dictate the minimum and maximum
ISO settings that the camera will use.
The minimum and maximum ISO settings selected by the camera during Safety Shift
are set in the Auto Range option of the Shooting 2 menu > ISO Speed Settings. The
camera will choose an ISO setting in that range unless you have manually selected an
ISO setting outside that range, and in that case the camera may exceed the set range,
up to your manually selected ISO. Safety Shift may override the Range for Stills or
Minimum Shutter Speed that you also set in this Shooting 2 menu > ISO Speed Settings
if it needs to in order to obtain the proper exposure.
Consider enabling Safety Shift in unpredictable or erratically changing lighting
situations, except when shooting with a flash and you need more precise control of the
exposure settings to avoid blur and don't want the camera overriding your settings
without you having control or even realizing it, as Safety Shift operates even when a
flash is used. Failing to disable it during flash use may drive you crazy as you try to
determine why the resulting exposures do not seem to be changing based on your
settings changes, because the camera keeps over-riding your settings with Safety Shift.
Keep this in mind if you are going to be photographing indoor events or receptions using
a flash.
recommend: Set for ISO Speed when needed for certain shooting situations. Disable
when using flash and controlling your exposure settings and flash output.
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