Custom Functions are organized into four groups based on the function type: C.Fn I: Exposure, C.Fn II: Image, C.Fn III: Autofocus/Drive, C.Fn IV: Operation/Others.
C.Fn I: Exposure
C.Fn-1 Exposure level increments
Sets 1/2-stop increments for the shutter speed, aperture, exposure compensation, AEB, flash exposure compensation, etc. Effective when you prefer to control the exposure in less fine increments than 1/3-stop increments.
IS 4.S"2","V,2lso 9*
C.Fn-2 ISO exp nsion
For the ISO speed, "H" (equivalent to ISO 12800) will be selectable.
C.Fn-3 Flash sync. speed in Av (Aperture-priority AE) mode
The flash sync speed is set automatically within a range of 1/200 sec. to 30 sec. to suit the scene's brightness.
When flash is used with aperture-priority AE (Av), this prevents a slow flash-sync speed from being set automatically in low-light conditions. It is effective for preventing subject blur and camera shake. However, while the subject will be properly exposed with the flash, the background will come out dark.
The flash-sync speed is fixed to 1/200 sec. This more effectively prevents subject blur and camera shake than with setting 1. However, the background may come out darker than with setting 1.
When 1 or 2 is set, high-speed sync cannot be used with an external Speedlite.
C.Fn II: Image
C.Fn-4 Long exposure noise reduction
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.
Noise reduction is performed for all exposures of 1 sec. or longer. The [On] setting may be effective for noise that cannot be detected or reduced with the [Auto] setting.
y . With setting 1 and 2, after the picture is taken, the noise reduction process may take the same amount of time as the exposure. You cannot take another picture until the noise reduction process is completed. « At ISO 1600 and higher, noise might be more pronounced with setting 2
than with setting 0 or 1. t With setting 2, if a long exposure is shot during Live View display, "BUSY" will be displayed during the noise reduction process. The Live View display will not appear until the noise reduction is completed. (You cannot take another picture.)
Reduces the noise generated in the image. Although noise reduction is applied at all ISO speeds, it is particularly effective at high ISO speeds. At low ISO speeds, the noise in the shadow areas is further reduced. Change the setting to suit the noise level. 0: Standard 1: Low 2: Strong 3: Disable y
With setting 2, the maximum burst for continuous shooting will greatly decrease.
C.Fn-6 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.
o. With setting 1, the [Disable] setting automatically takes effect for the Auto Lighting Optimizer (p.103) and it cannot be changed. • With setting 1, noise may become slightly more pronounced than usual.
0 With setting 1, the settable ISO speed range will be 200 - 6400.
Also, the <D+> icon will be displayed on the LCD monitor and in the viewfinder when highlight tone priority is enabled.
C.Fn III: Autofocus/Drive
C.Fn-7 AF-assist beam firing
The AF-assist beam can be emitted by the camera's built-in flash or by an external, EOS-dedicated Speedlite.
0: Enable 1: Disable
The AF-assist beam is not emitted. 2: Enable external flash only
If an external, EOS-dedicated Speedlite is attached, it will emit the AF-assist beam when necessary. The camera's built-in flash will not fire the AF-assist beam. 3: IR AF assist beam only
Among EOS-dedicated Speedlites, only those which have an infrared AF-assist beam will be able to emit the beam. This prevents any Speedlite which uses a series of small flashes (like the built-in flash) from firing the AF-assist beam.
0 If the external, EOS-dedicated Speedlite's [AF-assist beam firing] Custom Function is set to [Disabled], the Speedlite will not emit the AF-assist beam even if the camera's C.Fn-7-0/2/3 is set.
C.Fn-8 Mirror lockup
0: Disable 1: Enable
Prevents camera vibrations caused by the reflex mirror action which can disturb shooting with super telephoto lenses or close-up (macro) shooting. See page 106 for the mirror lockup procedure.
C.Fn IV: Operation/Others
C.Fn-9 Shutter/AE lock button
Convenient when you want to focus and meter separately. Press the < A> button to autofocus, and press the shutter button halfway to apply AE lock. 2: AF/AF lock, no AE lock
In the AI Servo AF mode, you can press the < A> button to stop the AF operation momentarily. This prevents the AF from being thrown off by any obstacle passing between the camera and subject. The exposure is set at the moment the picture is taken. 3: AE/AF, no AE lock
This is useful for subjects which keep moving and stopping repeatedly. In the AI Servo AF mode, you can press the < A> button to start or stop the AI Servo AF operation. The exposure is set at the moment the picture is taken. Thus, the optimum focusing and exposure will always be achieved as you wait for the decisive moment.
When 1 or 3 is set, pressing the Remote Switch (p.205) halfway will not work.
C.Fn-10 Assign SET button
You can assign a frequently-used function to <0>. Press <0> when the camera is shooting-ready. 0: Normal (disabled) 1: Image quality
Press <0> to display the image-recording quality setting screen on the LCD monitor.
Press the <S> key to select the image-recording quality, then press <0>.
2: Flash exposure compensation
When you press <0>, the flash exposure compensation setting screen will appear. 3: LCD monitor On/Off
Assigns the same function as the <DISP.> button. 4: Menu display
Assigns the same function as the <MENU> button. 5: ISO speed
Assigns the same function as the <IS0> button.
C.Fn-11 LCD display when power ON
0: Display on
When the power switch is turned on, the shooting settings will be displayed (p.44). 1: Previous display status
If you pressed the <D > button and turned off the camera while the LCD monitor was off, the shooting settings will not be displayed when you turn on the camera again. This helps to save battery power. The menu screens and image playback will still be displayed when used. If you pressed the <D > button and turned off the camera while the LCD monitor was on, the shooting settings will be displayed when you turn on the camera again.
C.Fn-12 Add image verification data
0: Disable 1: Enable
Data for verifying whether the image is original or not is appended to the image automatically. When the shooting information of an image appended with the verification data is displayed (p.173), the <fl> icon will appear.
To verify whether the image is original, the Original Data Security Kit OSK-E3 (sold separately) is required.
3] The images are not compatible with the image encryption/decryption features of Original Data Security Kit OSK-E3.
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