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digital zoom nikon D3200

  • 02-11-2014 6:47pm
    #1
    Yorker
    Closed Accounts Posts: 164 ✭✭


    when i look at properties of a pictureit says digital zoom 1. What does this mean. Fara s i know rthere is only optical zoom on the nikon D3200


Comments

  • #2
    DaireQuinlan
    Registered Users, Registered Users 2 Posts: 6,705 ✭✭✭DaireQuinlan


    Technically there's no 'zoom' at all on the camera, though there are lenses of varying focal lengths that you can attach. Anyhow, a digital zoom of 1 would imply that there has been no digital zoom.


  • #3
    Yorker
    Closed Accounts Posts: 164 ✭✭Yorker


    DaireQuinlan wrote: »
    Technically there's no 'zoom' at all on the camera, though there are lenses of varying focal lengths that you can attach. Anyhow, a digital zoom of 1 would imply that there has been no digital zoom.
    Thanks how can a digital zoom of 1 imply no digital zoom


  • #4
    DaireQuinlan
    Registered Users, Registered Users 2 Posts: 6,705 ✭✭✭DaireQuinlan


    It's a ratio. Technically, from the Exif spec, if digital zoom wasn't used the value ought to be 0, but given the problems that would give in a naive exif client, I'd say some camera manufacturers plump for '1' to indicate the same thing.

    -edit- from a quick check, both Canon and Nikon seem to write out 1 into this field as a default.


  • #5
    Yorker
    Closed Accounts Posts: 164 ✭✭Yorker


    DaireQuinlan wrote: »
    It's a ratio. Technically, from the Exif spec, if digital zoom wasn't used the value ought to be 0, but given the problems that would give in a naive exif client, I'd say some camera manufacturers plump for '1' to indicate the same thing.

    -edit- from a quick check, both Canon and Nikon seem to write out 1 into this field as a default.
    intersting thanks but what problems would 0 give in a naive exif client.What does naive exif client mean?


  • #6
    DaireQuinlan
    Registered Users, Registered Users 2 Posts: 6,705 ✭✭✭DaireQuinlan


    Yorker wrote: »
    intersting thanks but what problems would 0 give in a naive exif client.What does naive exif client mean?

    ach by which I mean some client that's written in a slapdash manner. The apparent focal length of the shot would be something like focalLength * digitalZoomRatio, if the default value for digital zoom is 1.0 there're no problems. If the default is 0 then you have to account for that case or your apparent focal length ends up as 0 as well.


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