A&P macro help v. extension tubes

Discussion in 'Lifestyle' started by craigl33, Aug 9, 2006.

  1. craigl33

    craigl33 New Member

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    facts:
    rebel xt
    kit lense
    about 3" extension tube

    i can't seem to focus very well. is this because of the extension tubes and it's just a downfall of them or the the kit lense? or something else?


    [​IMG]
     
  2. Derrict

    Derrict No, I am not Amish OT Supporter

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    both but the kit lens is the weakness since it isn't very sharp til stopped down ~ 5.6-8.0
     
  3. craigl33

    craigl33 New Member

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    k i'll try that
    here's f8. i think it's slightly better.

    [​IMG]
     
    Last edited: Aug 9, 2006
  4. CornUponCob

    CornUponCob New Member

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    Try focusing by moving your body / camera back and forth instead of turning the focus ring. The DOF at these working distances is only a few mm.
     
  5. craigl33

    craigl33 New Member

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    that's what i'm doing
     
  6. CornUponCob

    CornUponCob New Member

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    Well, those shots are in focus. The kit lens just isn't that sharp, and the problem is magnified by the extention tubes. Whenever you see the bokeh develop on both sides of your focus point, you know you focused correctly.

    If it's still blurry it could be camera shake, and if it's still blurry after that, then your lens is not ver sharp.
     

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