Understanding Exposure question

Discussion in 'Photography Beginners' Forum' started by julie32, Jan 19, 2008.

  1. julie32

    julie32 TPF Noob!

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    What does Peterson mean when he says he "presets his focus via the distance scale on the font of the lens?"

    I'm having trouble getting everything sharp from front to back when I need it.
    I'm using a Canon 5D and a 24-70mm 2.8.

    Thank you
     
  2. Ls3D

    Ls3D TPF Noob!

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    My guess (just finishing the book) is that he is referring to the analog scale that is on the top of his (and my) lens. Remember a stop of f/22 or near there is part of the puzzle. Also you have to take the exposure to see the results, in case you are using live view, etc..

    -Shea :mrgreen:
     
  3. ann

    ann No longer a newbie, moving up!

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    most modern zoom lenses no longer have the footage scales and if they do it usually only covers f11 or f16.

    DOF is controled by more than just fstop, it includes focal point and focal length.
     
  4. Happy Hour

    Happy Hour TPF Noob!

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    I think your right. most of my Minolta lenses have it on them. but I don't think more modern lenses do. at least none that I've seen or have.
     
  5. Ls3D

    Ls3D TPF Noob!

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    Well in the context of the book he is discussing setting the focal length just by the analog scale in exposures ranging form f/16 - f/32, and how the preview through the view finder is misleading.

    -S
     
  6. airgunr

    airgunr TPF Noob!

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    Most commonly on prime lenses you will find the Depth Of Field (DOF) scale on the barrel of the lens.

    You would set your aperture, say f16, on your lens. Then looking at the scale you find both of the markings for f16. Figure out what is the maximum distance you want and set one marking to that. The other will show the minimum distance that will be in focus.
     
  7. julie32

    julie32 TPF Noob!

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    airgunr---that's exactly what I needed to hear.

    thanks for the responses guys.
     

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