PTLens lens profile

Discussion in 'Digital SLR' started by Q-Max, Jan 1, 2006.

  1. Q-Max

    Q-Max Guest

    can someone help me to find the PDF user guide where is described how to
    a profile for a lens ? I'd like to create a profile for my Zenitar 16mm used
    with a
    Canon 20D to remove fish-eye effect, but I'm no more able to find hao to on
    the PTLens website.

    Thanks, Max
    Q-Max, Jan 1, 2006
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  2. Q-Max

    John Bean Guest

    You don't need a profile for any fisheye lens, the current
    PTLens has a "fisheye" check box which when checked allows
    you to interactively de-fish the lens and correct CA as
    necessary. There's a grid option to help with this.
    John Bean, Jan 1, 2006
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  3. Q-Max

    Q-Max Guest

    Thanks John for your reply,
    I know of the Fish-Eye settings, the idea is to create a proper profile to
    automate that correction, without resettings everytime lens distortion
    and chromatic aberration.

    Q-Max, Jan 2, 2006
  4. Q-Max

    John Bean Guest

    It should remember them from the last usage. I use it as a
    Photoshop plugin and it's also now well-behaved when used in
    a PS action, remembering its settings.

    The biggest value of the non-profiled use is it doesn't crop
    automatically, giving access to the full horizontal field of
    view of the lens. The profiled version crops to retain the
    original aspect ratio which loses *a lot* of the HFOV.
    John Bean, Jan 2, 2006
  5. SNIP

    The procedure can apparently be found in the PTLens user manual and
    requires a donation: , download page.

    There are several sources that discuss calibration for distortion and
    CA correction. discusses it under the
    Calibration topic.

    There is also a Photoshop tool (action+script) that assists in CA
    removal: There are lots of free tools, and
    references to other websites, on that page.

    Bart van der Wolf, Jan 5, 2006
  6. Q-Max

    Q-Max Guest

    Thanks Bart,
    I've sent a donation yesterday and now I have the complete user manual

    I'll take a look at these links.

    Q-Max, Jan 5, 2006
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