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Thread: what the hell is it ??, and how do i avoid it ..

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    what the hell is it ??, and how do i avoid it ..

    hello again.
    below is a pan i stitched of the gallery in melbourne library.
    i noticed that it has what i think is called banding around the centre 3rd of the image.
    just want to know what it is and how to avoid in the future .



    any help would be great.
    exif is-
    f4.5
    iso200 ( i wanted to make the light illuminate rather than camera settings )
    taken at 18mm
    at 1/50th
    canon 550d
    18-135mm lens

    regards
    josh
    Last edited by rowdy23; 27-11-2010 at 12:02pm.

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    Member Adrian Fischer's Avatar
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    Do you mean on the floor?
    ______________________________________________

    Adrian Fischer
    Brisbane, Australia

    Gear: Nikon D80, D300, Nikon 35mm f1.8, 50mm f1.8, 85mm f1.8, 105mm f2.5, 18-200 VR, 70-200 VR, Sigma 28-70mm f2.8, Sigma 50-500, Tonkina 12-24 f4, SB-600, various YongNuo Strobes, various umbrellas, 6 x 300w studio flashes, various softboxes, reflectors, stands, transmitters and receivers.

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    hi adrian....
    i mean the ghosting in the top half of centre 3rd.
    it actually looks like some weird reflection of the floor...

    not sure how that could be.

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    Ausphotography Site Sponsor/Advertiser OzzieTraveller's Avatar
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    G'day josh

    When I enlarge my screen image to about 300% I can now see what you're referring to - at about the 11 o'clock to 2 o'clock position to the central white bit

    It is a plain ole case of "light refraction" ... every lens will respond to an extremely bright -but small- light source, esp where that light source is off-centre to the direction of the lens itself
    As I see it, your lens has picked up the very bright reflections from the floor and has "hazed" them diagonally across the internals of the lens to become visible on the other side of the image ~ all pretty normal for a lens

    What to do about it?
    In this context - maybe not much, tho a pro 'tog in a commissioned job would arrange for the doors to the other room to be closed to prevent it occuring

    Hope this helps a bit ...
    Regards, Phil
    Of all the stuff in a busy photographers kitbag, the ability to see photographically is the most important
    google me at Travelling School of Photography
    images.: flickr.com/photos/ozzie_traveller/sets/

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    gday ozzie...
    that helps alot,
    thanks heaps for your post, great info.

    josh

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