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Custom Functions

Custom functions on the EOS 50D are split into four categories, each has its own menu and is identified using a roman numeral (I, II, III and IV).

 

C.Fn I: Exposure

Option
Values
I-1: Exposure level increments 0: 1/3 stop
1: 1/2 stop
I-2: ISO speed setting increments 0: 1/3 stop
1: 1 stop
I-3: ISO expansion 0: Off
1: On (enables H1 and H2 ISO modes)
I-4: Bracketing auto cancel 0: On
1: Off
I-5: Exposure Bracketing sequence 0: 0, -, +
1: -, 0, +
I-6: Exposure Safety shift 0: Disable
1: Enable (Tv/Av)
I-7: Exposure flash sync speed in Av mode 0: Auto
1: 1/250-1/60 sec auto
2: 1/250 sec (fixed)

C.Fn II: Image

Option
Values
II-1: Image Long exp. noise reduction 0: Off
1: Auto
2: On
II-2: High ISO speed noise reduction 0: Standard
1: Low
2: Strong
3: Disable
II-3: Image Highlight tone priority 0: Disable
1: Enable
II-4: Image Auto Lighting Optimizer 0: Standard
1: Low
2: Strong
3: Disable

C.Fn III: Auto focus / Drive

Option
Values
III-1: Lens drive when AF impossible 0: Focus search on
1: Focus search off
III-2: Lens AF stop button function 0: AF stop
1: AF start
2: AE lock
3: AF point: M->Auto / Auto->Ctr
4: One Shot <-> AI Servo
5: IS start
III-3: AF point selection method 0: Normal
1: Multi-controller direct
2: Quick Control Dial direct
III-4: Superimposed display 0: On
1: Off
III-5: AF-assist beam firing 0: Enable
1: Disable
2: Only external flash emits
III-6: Mirror lockup 0: Disable
1: Enable
III-7: AF Microadjustment 0: Disable
1: Adjust all by the same amount
2: Adjust by lens

C.Fn IV: Operation / Others

Option
Values
IV-1: Shutter button / AF-ON button 0: Metering + AF start
1: Metering + AF start / AF stop
2: Metering start / Meter+AF start
3: AE lock / Metering + AF start
4: Metering + AF start / disable
IV-2: AF-ON / AE lock button switch 0: Disable
1: Enable
IV-3: Assign SET button
0: Normal (disabled)
1: Image quality
2: Picture Style
3: Menu display
4: Image replay
5: Quick control screen
IV-4: Dial direction during Tv/Av 0: Normal
1: Reverse direction
IV-5: Focusing Screen 0: Ef-A
1: Ef-D
2: Ef-S
IV-6: Add original decision data 0: Off
1: On
IV-7: Assign FUNC. button 0: LCD brightness
1: Image quality
2: Exposure comp/AEB setting
3: Image jump with dial
4: Live View function settings

My Menu

The 'My Menu' feature on the EOS 50D 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 such as Mirror lockup can now be brought to a top level menu.

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