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 2003-2023, 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)