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P20/1.7 AF noise -- Does this copy have an issue?

Discussion in 'Native Lenses' started by WT21, Dec 1, 2012.

  1. WT21

    WT21 Mu-43 Hall of Famer

    Feb 19, 2010
    Boston
    Hi P20 owners.

    It's been a while since I've had a Panasonic 20mm lens. I had one for about 2 1/2 years, but haven't had one for the last maybe 6 months or more.

    I decided to get a used one, and recently got it in the mail, but it sounds odd to me. The seller has agreed to take it back on return, which I greatly appreciate, but before wasting anyone's time, and in case the lens is OK and I'm remembering it incorrectly, I wanted to see what others thought. Is this what other folks P20 sounds like when auto-focusing? I don't remember it sounding quite like this, but maybe my memory is just faulty. It also noticeably vibrates when focusing.

    Any input is appreciated.

    video of focusing: https://vimeo.com/54694366 (focusing is on a white ceiling, so it's not catching focus. It's not the focus lock I'm questioning, it's the sound and vibration)
     
  2. LeoS

    LeoS Mu-43 Top Veteran

    517
    Aug 6, 2012
    Yes, it should sound smoother than that.
    Yours has a slight vibration/wobbly sound as it zooms in and out.
     
    • Like Like x 1
  3. mr_botak

    mr_botak Mu-43 Veteran

    222
    Dec 4, 2011
    Reading, UK
    David
    Yes - sounds a bit rougher than mine, the volume is about the same but yours is more of a rasping sound, almost like there's sand or something in there.
     
    • Like Like x 1
  4. F1L1P

    F1L1P Mu-43 Veteran

    388
    Jan 2, 2010
    Europe
    I think you have a normal copy of the lens.

    Yes it is not silent when focusing.
    I'd imagine, when I play this video on my speakers it sounds much more louder than in real life. Apart from loudness issue, I had the same sound since the day I bought P20 in store.

    Yes front element does move and produces mild vibrations.
     
    • Like Like x 1
  5. WT21

    WT21 Mu-43 Hall of Famer

    Feb 19, 2010
    Boston
    The audio is actually pretty accurate, if not just a touch quiet.
     
    • Like Like x 1
  6. LeoS

    LeoS Mu-43 Top Veteran

    517
    Aug 6, 2012
    WT21: what did you use to record the video?
    I can take recording of mine, the pitch is slightly higher and smoother (more even).
     
  7. WT21

    WT21 Mu-43 Hall of Famer

    Feb 19, 2010
    Boston
    Just an rx100
     
  8. LeoS

    LeoS Mu-43 Top Veteran

    517
    Aug 6, 2012
    • Like Like x 1
  9. WT21

    WT21 Mu-43 Hall of Famer

    Feb 19, 2010
    Boston
    Thanks Leo! That's a huge help. That's how I remember my two or three prior 20mm lenses sounding - like in your video.
     
  10. M4/3

    M4/3 Mu-43 Top Veteran

    713
    Sep 24, 2011
    Anyone know when the all new silent focus 20mm 1.7 is due out?