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D850 back buttion focus won't work in live view, works with viewfinder

d850 back button focus live view

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#1
chingwe

chingwe

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I have been using back button focus (using AF-ON button) since I got the camera 13 months ago, in both live view and through the viewfinder.  Two days ago it stopped focusing in live view with the AF-ON buttion, but continues to focus through the viewfinder.  Changed batteries, lenses, and even reset the camera but it will not focus in live view with the AF-ON button.  Touching the screen in live view will generate the focus cycle.

 

If I change A8 to shutter/AF-ON, in live view it will focus with the shutter but not the AF-ON button.  I can assign focus to the FN1 button, and it will work in live view...and may even be a better choice when using live view since my finger rests near there naturally. 

 

I mostly shoot through the viewfinder, so it won't stop my activities but have to wonder if this is the beginning of a more serious problem.  Has anybody else experienced this?

 

Firmware version:  C 1.11, LD 2.018

 

Thanks in advance for any insight.

 

 







Also tagged with one or more of these keywords: d850, back button focus, live view