Giraffe

Discussion in 'Nature & Wildlife' started by WhisperedLitany, Dec 22, 2008.

  1. WhisperedLitany

    WhisperedLitany TPF Noob!

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    Taken July 26th, 08 at the Como Zoo down in St.Paul.

    Can anyone tell me if the grid like pattern in the background is normal? I've always had this question.... I dont know if it was just heat waves, or if my camera was acting up because of the heat and sunlight hitting it.


    [​IMG]

    [​IMG]


    I have quite a few photos with it, but i decided just to post two of them.

    Critique is also welcome.
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Your 'gird like' pattern doesn't look 'normal' to me. The out of focus areas in a photo are called Bokeh. How the bokeh looks is largely a function of the lens and it's design.
    Typically, better quality lenses have better looking bokeh.

    My guess is that your 70-300mm lens is showing it's weaknesses here.

    It could also be something with your camera/sensor...I don't know. Have you tried other lenses to see if you get the same effect?

    Can you show us the full EXIF info for those shots?
     
  3. WhisperedLitany

    WhisperedLitany TPF Noob!

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    Ohhh. :( I knew it wasn't normal.
    I havent ever tried doing it with my 18-55mm, but i probably will try next summer.

    I'm not sure what you mean by EXIF info, but i think this is what it is..

    First Picture:

    Make: Canon
    Model: Canon EOS DIGITAL REBEL XTi
    Shutter Speed: 1/320 second
    F Number: F/7.1
    Focal Length: 300 mm
    ISO Speed: 200
    Date Picture Taken: Jul 26, 2008, 2:58:01 PM


    Second Picture:

    Make: Canon
    Model: Canon EOS DIGITAL REBEL XTi
    Shutter Speed: 1/640 second
    F Number: F/7.1
    Focal Length: 271 mm
    ISO Speed: 200
    Date Picture Taken: Jul 26, 2008, 3:00:01 PM



    let me know if thats not what you're talking about. :???:
     
  4. MikeBcos

    MikeBcos TPF Noob!

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  5. WhisperedLitany

    WhisperedLitany TPF Noob!

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    Yes, they also appear on full sized images.
    They are just as noticable even without editing brightness.
     
  6. MikeBcos

    MikeBcos TPF Noob!

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    Then I'm going to guess it's a camera fault, a pattern like that is unlikely to be produced by a lens, it's in the image creation or processing.
     
  7. WhisperedLitany

    WhisperedLitany TPF Noob!

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    I dont have to replace anything, do i? X__X
    I would think that it happens to alot of other people.. well.. some people atleast..
     
  8. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Can you replicate the problem with an easy set up? If so, I'd suggest you take your camera and lens into a camera store. Try your camera with a different lens and try your lens with a different camera. Save all the shots onto your memory card. Then you can compare the shots and narrow down where the problem might be.
     
  9. WhisperedLitany

    WhisperedLitany TPF Noob!

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    Thats a really good idea.
    Its just convincing my dad to bring me xD.
     
  10. doenoe

    doenoe TPF Noob!

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    did you by any chance shot these giraffes through a fence? I remember having a weird patern in some of my pics when shooting through a fence. Dont remember if it was as obvious as your shots though.
    Maybe im waaaay off, but im just thinking out loud here :)
     
  11. WhisperedLitany

    WhisperedLitany TPF Noob!

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    Not that i recall, but some of them were through a fence. but the pattern would of shown up as a more darker black grid pattern because i just compared them with the pictures through the fence. Its a really good thought though.
     
  12. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    There are several factors to how a fence might show up in an image. It might look like a black grid in some images...but if you change the aperture, the focus distance and the distance to the fence, the it will show up differently. But it probably would have be at least a little visable on the animal as well...not just the background.

    I think MikeBcos might be on the right track.
     

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