Has any one else had problems with the EOS 7D MKII back focus button?

[Hugh_T]

I upgraded from the 7D to the MKII last year and all went fine until a few weeks ago. Now, when I use back button focus, the focus point jumps to the centre while focusing then back to the point I chose. This doesn't happen if I assign the AE lock button to focusing but I prefer to use both independantly.

I'm fairly sure I may have change something in the settings but can't locate it. The other option is a hardwear fault.

I'm sure there's a genius out there with an answer.

[ebiggs1]

Set it back to factory defaults.  In the menu "Clear all settings".  Then start all over.

[RobertTheFat]

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@ebiggs1 wrote:

Set it back to factory defaults.  In the menu "Clear all settings".  Then start all over.

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Yeah, you're probably right; it's the expedient action. But I can understand why Hugh was hoping that someone could come up with the exact setting that got munged. Recovering from "Clear all settings" can be a tedious process.

[Hugh_T]

"Set it back to factory defaults.  In the menu "Clear all settings".  Then start all over."

That was one of the first things I tried. Unfortunately the MKII backup battery is internal so I'm not able to do a full reboot.

[ebiggs1]

The internal battery should only keep things like the date and time set, etc.  Clear all settings and perhaps Clear all Personal settings should do it.  I have sold my 7D and I don't have a 7D Mk II so I am unfamiliar with the exact menus.  Somebody else (Bob from Boston) should be able to tell you exactly how.

[cicopo]

I'm pretty sure you've set it to do that & can reverse that setting in one of the AF menus. Get your manual out & read up on just what you want it to do & you'll likely find where you went wrong. 

[cicopo]

One more thought to check. Does it do the same thing in both One Shot & AI Servo? Maybe you switched between them to have it react as it now does.