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Horizontal line image distortion with GH3. Not sure of the cause

Discussion in 'Panasonic Cameras' started by matthew_parent, Mar 15, 2014.

  1. matthew_parent

    matthew_parent Mu-43 Rookie

    14
    Mar 15, 2014
    Los Angeles (Hermosa)
    Hey Friends,

    Currently shooting set photography with a GH3. Noticed horizontal lines in images with white backgrounds. Thoughts? Appreciate the love.

    P1100812 copy.
     
  2. dhazeghi

    dhazeghi Mu-43 Hall of Famer

    Aug 6, 2010
    San Jose, CA
    Dara
    Electronic shutter?
     
    • Like Like x 1
  3. mattia

    mattia Mu-43 Hall of Famer

    May 3, 2012
    The Netherlands
    With fluorescent lighting?
     
    • Like Like x 1
  4. matthew_parent

    matthew_parent Mu-43 Rookie

    14
    Mar 15, 2014
    Los Angeles (Hermosa)
    Hey guys, yes to both. Shooting with electronic shutter and florescent lighting. Thanks!
     
  5. matthew_parent

    matthew_parent Mu-43 Rookie

    14
    Mar 15, 2014
    Los Angeles (Hermosa)
    I need to get off the electronic shutter train?
     
  6. GFFPhoto

    GFFPhoto Mu-43 All-Pro

    Feb 24, 2013
    It will produce unusual effects…

    13073901113_265803cb96.
    Santa Fe, NM by GFFPhoto, on Flickr
     
    • Like Like x 1
  7. matthew_parent

    matthew_parent Mu-43 Rookie

    14
    Mar 15, 2014
    Los Angeles (Hermosa)
    Darn and thanks GFF. Need the Electronic shutter because it will ruin sound. No work around?
     
  8. mattia

    mattia Mu-43 Hall of Famer

    May 3, 2012
    The Netherlands
    Change the shutter speed. It will work fine for most static but not all scenes.
     
  9. dhazeghi

    dhazeghi Mu-43 Hall of Famer

    Aug 6, 2010
    San Jose, CA
    Dara
    The problem is that the readout from the sensor isn't done all at once. With the GX7, there's roughly a 1/10-1/15 second gap between when the first line on the sensor is read and when the last line is read. Consequently, you get odd effects when something changes during that period. Fluorescent lights don't transmit continuously - they refresh periodically and that refresh rate is being recorded, causing the bands you see.

    There's not really much that can be done other than changing the shutter speed substantially, switching the lighting to incandescent, or using the mechanical shutter instead.
     
    • Like Like x 1
  10. matthew_parent

    matthew_parent Mu-43 Rookie

    14
    Mar 15, 2014
    Los Angeles (Hermosa)
    No way! Thanks a bunch sirs. I truly appreciate the explanation. Went for lower shutter and switched to mechanical when I could. Much better. There's always something new to learn. Thank you O wise masters of the forums!
     
  11. BigOwl

    BigOwl Mu-43 Regular

    61
    May 3, 2013
    San Antonio, Texas USA
    Al
    I don't have this problem, but I really appreciate learning about it. If I get any suspicious banding, I'll start working with shutter speed first.
     
  12. jloden

    jloden Mu-43 Hall of Famer

    May 15, 2012
    Hunterdon County, NJ
    Jay
    Yeah I shoot a lot of photos with the electronic shutter that have TV screens in the background for presentation materials, and I get brown banding on the screen at anything above 1/125s unfortunately. Goes away as long as I keep the shutter speed slower though... Just one of those things you have to work around and be aware of.
     
  13. matthew_parent

    matthew_parent Mu-43 Rookie

    14
    Mar 15, 2014
    Los Angeles (Hermosa)
    Last question. Anyone have fix it recommendations in post?
     
  14. jloden

    jloden Mu-43 Hall of Famer

    May 15, 2012
    Hunterdon County, NJ
    Jay
    Hrm, it's pretty nasty to fix in post. I'm not sure what you could do short of localized adjustments with a brush tool. Maybe someone else has a better technique though.
     
  15. TheRenaissanceMan

    TheRenaissanceMan Mu-43 Regular

    84
    Oct 11, 2013
    Nothing simple, no. It's stymied my every attempt at an easy fix.

    Sent from my SCH-I535 using Mu-43 mobile app
     
  16. GFFPhoto

    GFFPhoto Mu-43 All-Pro

    Feb 24, 2013
    • Like Like x 1
  17. T N Args

    T N Args Agent Photocateur

    Dec 3, 2013
    Adelaide, Australia
    call me Arg
    If the e-shutter is a priority, tackle the lighting --- if it is yours and you can control it. Even putting electronic ballasts in fluoro lights can fix it. (Try one first).