phpMan > perldoc > Image::ExifTool::Pentax

NAME
    Image::ExifTool::Pentax - Pentax/Asahi maker notes tags

SYNOPSIS
    This module is loaded automatically by Image::ExifTool when required.

DESCRIPTION
    This module contains definitions required by Image::ExifTool to interpret Pentax and Asahi maker
    notes in EXIF information.

NOTES
    I couldn't find a good source for Pentax maker notes information, but I've managed to discover a
    fair bit of information by analyzing sample images downloaded from the internet, and through
    tests with my own Optio S, Optio WP, K10D, K-01 and K-5, and with help provided by other
    ExifTool users (see "ACKNOWLEDGEMENTS").

    The Pentax maker notes are stored in standard EXIF format, but the offsets used for some of
    their cameras are wacky. The Optio 330 gives the offset relative to the offset of the tag in the
    directory, the Optio WP uses a base offset in the middle of nowhere, and the Optio 550 uses
    different (and totally illogical) bases for different menu entries. Very weird. (It wouldn't
    surprise me if Pentax can't read their own maker notes!) Luckily, there are only a few entries
    in the maker notes which are large enough to require offsets, so this doesn't affect much useful
    information. ExifTool attempts to make sense of this fiasco by making an assumption about where
    the information should be stored to deduce the correct offsets.

REFERENCES
    Image::MakerNotes::Pentax
    <http://johnst.org/sw/exiftags/> (Asahi models)
    <http://kobe1995.jp/~kaz/astro/istD.html>
    <http://www.cybercom.net/~dcoffin/dcraw/>
    (...plus lots of testing with my Optio WP, K10D and K-5!)

ACKNOWLEDGEMENTS
    Thanks to Wayne Smith, John Francis, Douglas O'Brien, Cvetan Ivanov, Jens Duttke, Dave
    Nicholson, Iliah Borg, Klaus Homeister, Louis Granboulan and Andras Salamon for help figuring
    out some Pentax tags, Ger Vermeulen and Niels Kristian Bech Jensen for contributing print
    conversion values for some tags, and everyone who helped contribute to the LensType values.

AUTHOR
    Copyright 2003-2022, Phil Harvey (philharvey66 at gmail.com)

    This library is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself.

SEE ALSO
    "Pentax Tags" in Image::ExifTool::TagNames, Image::ExifTool(3pm), Image::Info(3pm)