Custom Functions

The custom functions on the EOS 5D Mark III are split into four sub-pages - exposure, Display/Operation, Others and Clear. It's less long-winded than in previous EOS cameras as some functions have been moved elsewhere and the AF settings now got their own menu tab.

C.Fn1: Exposure

Option
Values
Exposure level increments  • 1/3 stop
 • 1/2 stop
ISO speed setting increments  • 1/3 stop
 • 1 stop
Bracketing auto cancel  • On
 • Off
Bracketing sequence  • 0, -, +
 • -, 0, +
 • +, 0, -
Number of bracketed shots  • 3
 • 2
 • 5
 • 7
Safety shift  • Disable
 • Shutter speed / Aperture (Tv/Av)
 • ISO speed

C.Fn2: Disp./Operation

Option
Values
Warnings in viewfinder  • When Picture Style Monochrome set
 • When WB is corrected
 • When one-touch image quality set
 • When ISO expansion is used
 • When spot metering is set
LV shooting area display  • Masked
 • Outlined
Dial direction during Tv/Av  • Normal
 • Reverse
Multi function lock  • Main Dial
 • Quick control dial
 • Multi-controller
Custom controls

 • Shutter button half-press
Metering and AF start
Metering start
AE lock
 • AF-On button
Metering and AF start
AE lock
AF stop
FE lock
AE lock
Disabled
 • AE lock button
AE lock
Metering and AF start
AF stop
FE lock
AE lock
Disabled
 • DOF-preview button
Depth-of-field preview
AF stop
AE lock
One Shot / AI Servo
IS Start
Switch to registered AF func.
One-touch image quality
One-touch image quality (hold)
FE lock
VF electronic level
Switch to registered AF point
AE lock (hold)
Off
 • Lens AF stop button
AF stop
Metering and AF start
AE lock
One Shot / AI Servo
IS start
Switch to registered AF func.
AE lock (hold)
Switch to registered AF point
 • M-Fn button
FE lock
AE lock
One-touch image quality
One-touch image quality (hold)
VF electronic level
AE lock (hold)
 • Set button
Disabled
Image quality
Picture Style
Menu display
Image replay
Magnify/Reduce
ISO speed
 • Main dial
Shutter speed setting in M mode
Aperture setting in M mode
 • Quick control dial
Aperture setting in M mode
Shutter speed setting in M mode
AF point direct selection
ISO speed
 • Multi-controller
Disabled
AF point direct selection

Custom Controls

The Custom Controls settings can be found within the Custom Functions menu and let you customize the function of many buttons and both dials of the camera.

C.Fn3: Others

Option
Values
Add cropping information  • Off
 • Aspect ratio 6:6
 • Aspect ratio 3:4
 • Aspect ratio 4:5
 • Aspect ratio 6:7
 • Aspect ratio 5:6
 • Aspect ratio 5:7
Default Erase option  • Cancel
 • Erase

C.Fn4: Clear

Option
Values
Clear all Custom Functions  • OK
 • Cancel

My Menu

The 'My Menu' feature on the EOS 5D Mark III allows you to produce a custom menu made up of any of the cameras menu options (including custom functions) which means that previously buried but useful options can now be brought to a top level menu.