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Thread: Round black shadow on the bottom

  1. #1
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    Round black shadow on the bottom

    Question all.

    My fiance has been taking some photos with the 17-70mm lens. Now I have a question when the lens has the small lens hood on and when the flash is used at 17mm there is a round black shadow at the bottom of every shot.

    Now I haven't had time to test or upload photo's but my thoughts are the flash is hitting the hood causing the shadow.

    Now quickly I took the lens hood off and the shadow is gone and only tiny on some pics.

    Is this because the flash hits the lens hood at 17mm? I will try and get photos up later.
    Site: DzR Photography
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    Hi DZB

    I'm pretty sure it's the flash (built in) & the hood causing this
    The very thing happened to me with a canon 17-85 (at 17mm) and it's hood

    I guess it's all part of the learning curve
    Because of the wide angle, mine was even being affected by a polarizing filter, at each corner it was darkened
    Last edited by B D H; 04-02-2009 at 8:06pm.
    Bryan

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    Ausphotography Regular
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    Hi Dz its your lens hood causing the problem cheers.

    steve.

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    Yup its the pop up flash causing the problem and the hood (and maybe the length of the lens) blocking off the light.

    When my sister borrowed my 24-70 sigma it happened to her.
    Last edited by tannyboy; 04-02-2009 at 8:31pm.
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  6. #6
    Administrator ricktas's Avatar
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    Definitely lens hood. With some lenses and setups, even without a hood, the edge of the actual lens does the same thing. But in your case, remove the lens hood and you should be just fine.
    "It is one thing to make a picture of what a person looks like, it is another thing to make a portrait of who they are" - Paul Caponigro

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    I noticed this once with one of my lenses, took the hood off and no worries.....however when it happened to me the shadow wasn't like yours, it was up the other way, concave not convex ? Almost looks like the shadow from the photgrapher bending over to take a picture and that's their shadow.

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    Happened to me too when I first got my camera .. it is definitely the hood, and sometimes, as Rick said, the flash can clip the edge of the lens barrel too .. it usually happens when you use a zoom at the long end and are standing too close to your subject, or shooting from a slightly downward perspective, as in the example photo of the birthday cake .. for it to be clipping at 17mm you must be standing pretty close to your subjects though .. ultimate solution: external flashgun
    Hi Im Darren

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