Image:...:Pentax(3pm) User Contributed Perl Documentation Image:...:Pentax(3pm)
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 2003-2025, 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)
perl v5.40.1 2025-03-16 Image:...:Pentax(3pm)
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