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Distance to subject ? EXIF ?

  • 20-09-2007 7:56am
    #1
    Muineach
    Closed Accounts Posts: 575 ✭✭✭


    Just from looking through some of my own photo's one thing I would like to know for some of them is the distance to "focus point/subject" ?

    To keep things simple I'm using "spot" focusing , one point focusing.

    I know for any photo the focal length and the f-stop from the EXIF, but I cannot find the distance to focus point, the camera has to "know" roughly the distance as it focuses on it, and when you take a photo you can read it off the lens itself.

    Using DOF Calculator I can get the range of the DOF by giving it the distance to subject.

    So is there anyway to calculate the distance to focus point after the photo is taken ? Is it somewhere is the EXIF ?

    I just thought it would be interesting thing to know for some photo's.

    Thanks
    Muineach


Comments

  • #2
    Alun
    Registered Users, Registered Users 2 Posts: 21,499 ✭✭✭✭Alun


    There is an EXIF field called "SubjectDistanceRange", but in any photos of mine (Nikon D70s or Olympus P&S) this always seems to display as Unknown in any EXIF viewer I've used.


  • #3
    Muineach
    Closed Accounts Posts: 575 ✭✭✭Muineach


    Yea, I was looking into it in a bit more detail, in EXIF theres a Tag for the manufactures to add in their own tags, and from reading on the web they have a "DistanceToSubject" but with Canon it's always 0, damn, would have been very handy.


  • #4
    ThOnda
    Registered Users, Registered Users 2 Posts: 4,699 ✭✭✭ThOnda


    As Kappa once said: "If your pictures are not good enough, you were not close enough."


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