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Thread: depth of field, f stops => feet/meters possible

  1. #1

    Default depth of field, f stops => feet/meters possible

    Hi,

    Is it possible to know/calculate what will be in focus given the f stops

    Like if I set f 3.5, what distance/depth will be in focus?
    If its a zoom lens, how does it affect?

    Thanks

  2. #2

    Default Re: depth of field, f stops => feet/meters possible

    here is the calculation webby:

    http://www.dofmaster.com/dofjs.html

  3. #3

    Default Re: depth of field, f stops => feet/meters possible

    turtl3fly, Thanks.

    Exactly what I was looking for.

  4. #4
    Moderator ed9119's Avatar
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    Default Re: depth of field, f stops => feet/meters possible

    Quote Originally Posted by sglion View Post

    Like if I set f 3.5, what distance/depth will be in focus?


    Thanks
    DO NOT forget distance to subject in focus .... that is part of equation in determining DoF
    shaddap and just shoot .... up close
    Walkeast

  5. #5
    Moderator Octarine's Avatar
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    Default Re: depth of field, f stops => feet/meters possible

    Quote Originally Posted by sglion View Post
    If its a zoom lens, how does it affect?
    Then the calculated depth of field is only valid for one particular focal length. The moment you change the focal length (vulgo: zoom in / zoom out) the value for DOF changes.
    EOS

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