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Difference between ae/af lock button and half press shutter button.

Discussion in 'Panasonic Cameras' started by finerflower, Aug 11, 2014.

  1. I have always been confused by the af/ae lock button. If someone can explain the nuances, it would be greatly appreciated.

    My question is: Why would one press the af/ae lock button when the shutter button could do the same thing on a focus, recompose. I understand why one would set the button to lock ae only, but I just can't seem to grasp why it would ever be used to lock ae/af or just af.

    Is the purpose for the ae/af for something other than focus/recompose?

    Thanks in advance for your advice.
  2. metalmania

    metalmania Mu-43 Veteran

    Jul 19, 2012
    Looking at the time of OP, I thought I found the time machine.
  3. T N Args

    T N Args Agent Photocateur

    Dec 3, 2013
    Adelaide, Australia
    call me Arg
    You can lock the AF while you take a string of successive photos with the key subject all over the frame. That's very handy. In fact you can set the AF button to lock focus and stay locked while you release the AE/AF button, take as many shots as you need, then press AE/AF again to release focus.
    • Like Like x 1
  4. Bif

    Bif Mu-43 Top Veteran

    May 28, 2012
    San Angelo TX
    Bruce Foreman
    If you set the AE/AF button to autofocus and lock AF, it also switches to MF. With MF ASSIST set to ON, and the MF ASSIST function assigned to the lens focusing ring, the magnified assist "kicks in" as soon as you start turning the focus ring on the lens. A half press on the shutter release clears the magnified view back to normal view

    It remains in this MF mode shot after shot (and video take after video take) until as you point out another press of the AE/AF button clears autofocus back to default half press of the shutter button.

    The best of both AF and MF from one button.

    I have my GX7, GH3s, and GH4 all configured this way. It also worked almost the same on the GX1 I just gave to my grandson.
    • Like Like x 1
  5. budeny

    budeny Mu-43 All-Pro

    Mar 4, 2014
    Boulder, CO
    - recomposing is not suitable when camera is set on tripod.
    - for panoramas you want both focus and exposure remain the same over all tiles.
    - lesser shutter lag
    • Like Like x 1
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