D90 Automatically Moves While Bracketing

Discussion in 'Digital Discussion & Q&A' started by Lrk, Jun 3, 2010.

  1. Lrk

    Lrk TPF Noob!

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    While i was working on a HDR timelapse i noticed something strange.
    I was using the 3 step bracketing (since the D90 doesn't have a firmware update to a 5-step as far as i know). The D90 was mounted on a very firm and stable tripod. The first of the 3 shots (under) of each set was always pointed slightly downwards, the other 2 were perfectly aligned. After taking the 3rd shot it would immediately move back down again even if the next set was several seconds away.
    It's not a big problem, but i can't find the cause. I tried to look at the camera when it was taking the shots, but it doesn't seem to move.
    I drew a line were the top of the chimney was suppose to be.


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    OfftopicPS: Yeah, i noticed the buildings were underexposed, so i changed it a little in the next sets.
     
  2. pbelarge

    pbelarge TPF Noob!

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    My T1i did a very similar thing with bracketing. The third shot of bracketing was off by a hair and usually out of focus.
     
  3. KmH

    KmH Helping photographers learn to fish Supporting Member

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    The EXIF for the 3 images all show 1/4000, f/11, ISO 200, -2EV, Manual mode, Matrix metering.

    Something doesn't compute.
     
  4. Lrk

    Lrk TPF Noob!

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    I loaded them as layers in Photoshop, added a 4th for the line (so it's in the same place) and then exported the layers manually. It's probably from there.
     
  5. NateS

    NateS TPF Noob!

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    AF or MF? I'm guessing AF and the image will change just slightly when focus changes.
     
  6. robertwsimpson

    robertwsimpson No longer a newbie, moving up!

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    I'll bet you had it on AF and AI Servo (or whatever the Nikon equivalent is called)... Just flip to MF for autobracket shots. Problem solved!
     
  7. supraman215

    supraman215 TPF Noob!

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    Robert means turn VR off.
     
  8. robertwsimpson

    robertwsimpson No longer a newbie, moving up!

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    No, I'm pretty sure I meant turn AF off. Turning VR off would also be a good idea... I assume everyone does that when using a tripod.
     
  9. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Good call. :thumbup::D
     
  10. Lrk

    Lrk TPF Noob!

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    I may be noobish, but i'm not that noobish. It was on manual focus. But VR was on. I'll give it a test run tomorrow and let you know. Thanks.
     
  11. supraman215

    supraman215 TPF Noob!

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    Focus will not MOVE an object that's why I thought Rob meant VR. It may bring a blurry object into focus therefore moving the edge of the object closer to the object's center but that building was in focus to begin with.
     
  12. robertwsimpson

    robertwsimpson No longer a newbie, moving up!

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    Do an experiment. The view through my lenses changes slightly when focusing. I'll bet yours do too.
     

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