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| p.1 #2 · Used 5D MK II won't focus except in P mode |
Is your custom function set for back button focus? probably is...
check your manual (I don't have one handy). If the "AF ON" button works for focusing in other modes, that's likely the problem.
here it is:
Custom Function Group IV – Operation/Others settings
C.Fn IV -1 – Shutter button/AF-ON button
This is one of the most used Custom Functions as it allows you to set back button focus, so you can shoot static and moving subjects without having to change the AF mode.
Setting 0 – by default the Shutter button and AF-ON button both activate metering and start AF functions.
Setting 1 – causes the shutter button to start metering and AF operation, while the AF-ON button acts as an AF Stop to pause AF operation.
Setting 2 – this is one of the most common choices. The shutter button will start exposure metering and the AF-ON button will start autofocus and metering.
Setting 3 – this is another common one, with the shutter button being used to activate AE lock and the AF-ON button starting metering and autofocus.
Setting 4 – this disables the AF-ON button and makes the shutter button start both metering and autofocus.
make sure C.Fn IV -1 is set to 0 if you want 1/2 shutter button press to start auto focus
Edited on Dec 09, 2011 at 11:31 PM · View previous versions