Canon EOS 5D Mark IV L-series Zoom Lens Kit Owner's Manual

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3

 Custom Function SettingsN

If you perform 1, 2, or 3, a slower shutter speed will automatically 
be set to compensate for the number of stops the maximum 
aperture has become slower. The same exposure that would be 
obtained without performing 1, 2, or 3 is thereby obtained. The 
shutter speed will change automatically within the range set with 
[82: Set shutter speed range].

This function also works in the reverse with the above options: When 
the maximum aperture f/number changes to a smaller number (larger 
aperture opening).

 

This function does not work with macro lenses whose effective aperture 
value changes when the magnification changes.

 

This function does not work during movie shooting.

 

If [ISO speed] is set and the exposure cannot be maintained within the 
range set with [Range for stills], the same exposure that would be 
obtained without performing 1, 2, or 3 cannot be obtained.

 

If [Shutter speed] is set and the exposure cannot be maintained within 
the range set with [82: Set shutter speed range], the same exposure 
that would be obtained without performing 1, 2, or 3 cannot be obtained.

 

If you perform 1, 2, or 3 and the camera turns off (power switch is set to 
<2>, etc.) while the exposure is being maintained, the standard 
exposure will be updated to the exposure at the moment the camera 
turns off.

 

This function also works with changes in the highest f/number (minimum 
aperture).

 

With [ISO speed] or [Shutter speed] set, if you perform 1, 2, or 3 and 
then return to the state before performing 1, 2, or 3 without manually 
changing the ISO speed, shutter speed, or aperture, the original 
exposure setting will be restored.

 

If [ISO speed] is set and the ISO speed increases to an expanded ISO 
speed, the shutter speed may change to maintain the exposure.