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.IX Title "Image::ExifTool::Pentax 3pm"
.TH Image::ExifTool::Pentax 3pm "2017-01-15" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Image::ExifTool::Pentax \- Pentax/Asahi maker notes tags
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
This module is loaded automatically by Image::ExifTool when required.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module contains definitions required by Image::ExifTool to interpret
Pentax and Asahi maker notes in \s-1EXIF\s0 information.
.SH "NOTES"
.IX Header "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-1WP,
K10D,\s0 and K\-5, and with help provided by other ExifTool users (see
\&\*(L"\s-1ACKNOWLEDGEMENTS\*(R"\s0).
.PP
The Pentax maker notes are stored in standard \s-1EXIF\s0 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 \s-1WP\s0 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.
.SH "REFERENCES"
.IX Header "REFERENCES"
.IP "Image::MakerNotes::Pentax" 4
.IX Item "Image::MakerNotes::Pentax"
.PD 0
.IP "<http://johnst.org/sw/exiftags/> (Asahi models)" 4
.IX Item "<http://johnst.org/sw/exiftags/> (Asahi models)"
.IP "<http://kobe1995.jp/~kaz/astro/istD.html>" 4
.IX Item "<http://kobe1995.jp/~kaz/astro/istD.html>"
.IP "<http://www.cybercom.net/~dcoffin/dcraw/>" 4
.IX Item "<http://www.cybercom.net/~dcoffin/dcraw/>"
.IP "(...plus lots of testing with my Optio \s-1WP, K10D\s0 and K\-5!)" 4
.IX Item "(...plus lots of testing with my Optio WP, K10D and K-5!)"
.PD
.SH "ACKNOWLEDGEMENTS"
.IX Header "ACKNOWLEDGEMENTS"
Thanks to Wayne Smith, John Francis, Douglas O'Brien Cvetan Ivanov, Jens
Duttke and Dave Nicholson 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.
.SH "AUTHOR"
.IX Header "AUTHOR"
Copyright 2003\-2017, Phil Harvey (phil at owl.phy.queensu.ca)
.PP
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\*(L"Pentax Tags\*(R" in Image::ExifTool::TagNames,
\&\fIImage::ExifTool\fR\|(3pm),
\&\fIImage::Info\fR\|(3pm)