Audible noise from Sigma 18-200 OS HSM lens

Discussion in 'Digital Photography' started by Lorenzo Sandini, Jan 21, 2009.

  1. Hello,

    I already posted this question in rec.photo.digital.slr-systems, but to
    reach a wider audience, let me post it this here too, sorry if it is
    considered a double-post.

    I don't know if I should be worried or not. I just came back from my
    holidays with 700 photos or so, and I think my camera and lens worked as
    they should. But in the silence of the night, I noticed a faint
    continuous humming noise coming from the camera. The Nikon D80 body is
    silent, and my other lenses too, so I guess the noise comes from the
    Sigma lens when it is mounted and the camera powered. The noise can be
    heard constantly even with the camera sitting idle on my desk.

    I have been pointed to a review:
    http://www.photozone.de/canon-eos/407-sigma_18125_3856os_50d , where the
    author mentions:

    "The OS seems to have a little side effect though. You may be aware that
    the active OS/IS/VR produces a "humming" noise caused by the system
    which shifts the OS/IS/VR element to compensate shake. The Sigma has the
    strange behavior to do that in non-OS mode as well. Even more strange -
    the image gets "lifted" into position when switching on the camera.
    Obviously the OS system remains active to keep the OS element in a
    static position in non-OS mode. This behavior is "normal" and no defect.
    This unnecessary power drain may be somehow annoying but, frankly, most
    users will not disable the OS anyway."

    Apparently the lens works, but I never heard that noise before. Could
    anyone give me an opinion before I bring it to a specialist ? It's only
    3 months old and under warranty. Could you listen carefully to your lens
    (I know it sounds a bit stupid) and report here ?

    Thank you,
    Lorenzo
     
    Lorenzo Sandini, Jan 21, 2009
    #1
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  2. I hate to answer my own posts...

    I have visited 2 photo shops, where unfortunately the exactly identical
    Sigma lens wasn't available for testing. However we listened carefully
    to a wide variety of OS/VR equipped lenses from various manufacturers,
    and a similar noise was heard from many Canon lenses, however it was
    limited in time to a few seconds after the AF had focused. In my case
    the OS seems to be running all the time, even when I switch it off.

    I haven't noticed any power drain specifically caused by that lens, and
    since it seems to be working like it should, I'll let it be. I hope this
    little observation will help someone in a similar situation :)

    Follow-up posts are welcome though.

    Lorenzo
     
    Lorenzo Sandini, Jan 23, 2009
    #2
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  3. Lorenzo Sandini

    Guest Guest

    power drain will obviously be higher if the stablizer doesn't ever shut
    off.
    posted today:
    <http://www.dpreview.com/lensreviews/sigma_18-200_3p5-6p3_os_n15/>
     
    Guest, Jan 23, 2009
    #3
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