Canon Mark 3 User Manual

161
3 Custom Function Settings
C.Fn I -10     Select usable metering modes
Disable: All the metering modes ( q: Evaluative,  w: Partial,  r: Spot, 
e : Center-weighted average) will be selectable.
Enable: Only the metering modes set with [ Register] will be selectable.
Register: To make a metering mode unselectable, uncheck the checkmark 
. After entering the settings, select [ Apply].
C.Fn I -11     Exposure mode in manual exposure
You can set the metering mode to be used in the manual exposure mode....

162
3 Custom Function Settings
C.Fn I -14     Apply shooting/metering mode
While holding down the < A> (AE lock) button, you can switch to the 
registered setting (shooting mode, metering mode, shutter speed, aperture, 
or exposure compensation).
Disable: Pressing the < A> button will lock the exposure (AE lock).
Enable: By holding down the < A> button, you can instantly switch to the 
registered setting.
Register: Set the desired setting for the AE lock button: shooting mode, 
metering mode, shutter...

163
3 Custom Function Settings
C.Fn II: Image/Flash exposure/Display
C.Fn II -1     Long exposure noise reduction
0: Off
1: Auto
For 1 sec. or longer exposures, noise reduction is performed 
automatically if noise typical of long exposures is detected. This [ Auto] 
setting is effective in most cases.
2: On
Noise reduction is performed for all exposures 1 sec. or longer. The [ On] 
setting may be effective for noise that cannot be detected or reduced 
with the [ Auto] setting.
C.Fn II -2     High ISO...

164
3 Custom Function Settings
C.Fn II -3     Highlight tone priority
0: Disable
1: Enable
Improves the highlight detail. The dynamic range is expanded from the 
standard 18% gray to bright highlights. The gradation between the grays 
and highlights becomes smoother.
C.Fn II -4     E-TTL II flash metering
0: Evaluative flash meteringFully automatic flash photography for all conditions, from low light to 
daylight fill-flash.
1: Average flash metering
The flash is averaged for the entire area covered by...

165
3 Custom Function Settings
C.Fn II -6     Flash firing
Enables or disables the firing of an external flash or non-Canon flash 
connected to the PC terminal.
0: Enable
1: Disable
Convenient when you want to use the external flash’s AF-assist beam 
only. Note that whether or not the AF-assist beam is emitted is 
dependent on the C.Fn III -14 setting.
C.Fn II -7     Viewfinder info. during exposure
0: Disable
1: Enable
The viewfinder information will be displayed even during an exposure. Displays the...

166
3 Custom Function Settings
C.Fn III: Auto focus/Drive
C.Fn III -1     USM lens electronic MF
USM lens electronic MF can be enabled or disabled for when you use any 
of the following lenses.
EF50mm f/1.0L USM, EF85mm f/1. 2L USM, EF85mm f/1.2L II USM, 
EF200mm f/1.8L USM, EF 300mm f/2.8L USM, EF400mm f/2.8L USM, 
EF400mm f/2.8L II USM, EF500mm  f/4.5L USM, EF600mm f/4L USM, 
EF1200mm f/5.6L USM, or EF28-80mm f/2.8-4L USM
0: Enable after One-Shot AF
After focus is achieved in One-Shot AF, electronic...

167
3 Custom Function Settings
1: AF priority/Drive speed priority
For the first shot, focusing the subject is given priority. During continuous 
shooting, the continuous shooting speed is given priority over the focus-
tracking of the subject.
2: Release/Drive speed priority
For the first shot, shutter release is given priority over focusing the 
subject. During continuous shooting, the continuous shooting speed is 
given priority more than with setting 1.
C.Fn III -4     AI Servo AF tracking method
In...

168
3 Custom Function Settings
C.Fn III -6     Lens AF stop button function
0: AF stop
1: AF start
AF operates only while the button is pressed. While the button is 
pressed, AF operation with the camera is disabled.
2: AE lock When the button is pressed, AE lock is applied. Convenient when you 
want to focus and meter at different parts of the picture.
3: AF point: M  9 Auto/Auto  9 ctr
In the manual AF point selection mode, the button instantly switches to 
automatic AF point selection (among 45 AF...

169
3 Custom Function Settings
C.Fn III -7     AF Microadjustment
Normally, this adjustment is not required. Do this adjustment 
only if necessary. Note that doing this adjustment may 
prevent correct focusing from being achieved.
You can make fine adjustments of the AF’s 
point of focus. It can be adjusted in ±20 steps 
(-: Forward / +: Backward).
The adjustment amount of one step varies 
depending on the maximum aperture of the 
lens. Adjust, shoot, and check the focus. 
Repeat to adjust the AF’s...

170
3 Custom Function Settings
C.Fn III -8     AF expansion with selected point
In the AI Servo AF or One-Shot AF mode with manual AF point selection, 
you can increase the number of AF points by using the Assist AF points.
Effective when it is difficult to track a moving subject with just one AF point. 
0: Disable
1: Enable (left/right Assist AF points)
The points on the immediate left and right (or top and bottom for a 
vertical shot) of the user-selected AF point become active.
2: Enable (surrounding...