Problem with the AF-C on my Nex-5R (shakes like crazy)

Schteff · Dec 17, 2012

Hi!

I think I have a problem with the AF-C (continuous auto focus) on my Nex-5R.

In the following videos i demonstrate what happens when I have AF-C activated and press the shutter button halfway down.

(In short, the AF behaves like crazy and won't lock on anything)

1:

2:

3:

4:

Is this normal behavior? In video no 2 I have just factory reset the camera and activated AF-C.

With AF-C off the camera behaves better, and with AF-C on it does not always display this behavior.

offroadcmpr · Dec 17, 2012

I can't view youtube videos at work, but my 5R seems to take about twice as long to lock onto something using AF-C vs AF-S. So I just usually leave it on AF-S all of the time.

makeitso · Dec 17, 2012

It's normal behavior. It's the contrast auto focus detection pumping at the extremes of focus to try and ensure the shot it takes is in focus. I forget if this occurs with the 5r or the 6 as I know this happens with the 5n but AF-C is also the only way to get the camera to adjust exposure every shot in any burst mode.

Leaping Carp · Dec 17, 2012

Agreed, my NEX-5 does this. It looks like it never locks but in fact it's incredibly effective. Works great.

tunstonuk · Dec 17, 2012

I cannot watch your videos right now. But I guess your focus object is static. This is normal for af-c which is better used for moving objects. I believe it's in the manual saying use af-s for static objects.

Hope this helps

Schteff · Dec 17, 2012

Thanks!

Good thing I didn't make a fool of myself irl (just here

)

Bart Hickman · Dec 17, 2012

tunstonuk said:
tunstonuk wrote:

I cannot watch your videos right now. But I guess your focus object is static. This is normal for af-c which is better used for moving objects. I believe it's in the manual saying use af-s for static objects.

Hope this helps

Since video doesn't use the PDAF, you'll get this pumping because the CDAF has to do that to maintain focus. Still shot mode doesn't do this with PDAF working.

Bart

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Problem with the AF-C on my Nex-5R (shakes like crazy)

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