Why does software want focal length?

Discussion in 'Digital Photography' started by Click, Sep 30, 2003.

  1. Click

    Click Guest

    I have just ordered my first digital camera. I have noticed that some
    software,like Photo Impact 8 etc., allows you to enter the focal length for
    the camera. What is this going to do? If it does anything can I assume
    that the value might be meaningless if the camera has a zoom lens?
    Click, Sep 30, 2003
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  2. I don't use Photo Impact, so I can't speak for it, but software I use wants
    to know the effective 35mm focal length so the software can determine the
    field of view for stitching the photos together.
    Well, you are expected to know the focal length you _used_, not the range
    of the zoom. :)
    Phil Stripling, Sep 30, 2003
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