Science behind apature... explain.

Discussion in 'Photography Beginners' Forum' started by Boomn4x4, Mar 22, 2010.

  1. Boomn4x4

    Boomn4x4 TPF Noob!

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    I understand what apature is... I understand what it can do to photographs... but I've been bouncing this back and forth in my head, and it just dosen't make sense. Can someone explain how it works.

    A larger apature, smaller f value, lets in more light, softens background images... I get all of it except how it softens backgrounds. I would think that the more light that gets in, it would alow for more focus on backgrounds and would give you MORE depth of field, not less.

    Why is this so?
     
  2. NateWagner

    NateWagner TPF Noob!

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    My guess, and I'm sure I will be corrected, is that it has to do with the light coming through the smaller opening is more focused and is only coming from really a tiny angle. Whereas as the opening gets larger the light is able to come in from wider and less focused angles?
     
  3. PhotoXopher

    PhotoXopher TPF Noob!

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  4. KmH

    KmH Helping photographers learn to fish Supporting Member

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    The answers you seek are only partially related to aperture.

    The phenomena you seek to understand is Depth-Of-Field, which is not only effected by aperture but also by subject to lens distance, lens focal length, and subject to background distance:

    Depth of field - Wikipedia, the free encyclopedia
     
  5. Boomn4x4

    Boomn4x4 TPF Noob!

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    After sifting through the conglomerate of infomation provided by KmH's wiki link, I'd say you are correct.

    Thanks.
     
  6. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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    Buy this [ame="http://www.amazon.com/Understanding-Exposure-Photographs-Digital-Updated/dp/0817463003"]book[/ame].
    Read this site.
    Part II.
     
    Last edited: Mar 22, 2010
  7. iBats

    iBats TPF Noob!

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    aperture science, we do what we must because we can
     
  8. mdtusz

    mdtusz TPF Noob!

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    You will be baked, and there will be cake.
     
  9. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Oopsie!
     

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