Bug #494

Some EXIF data not retrieved from Canon RAW files

Added by Paul Waldo 1220 days ago. Updated 395 days ago.

Status:New Start:
Priority:Normal Due date:
Assigned to:- % Done:

0%

Category:exif
Target version:-

Description

Some of the EXIF data is not pulled out of Canon RAW (CRW) files, such as
Exposure bias
Flash
Focal length
Metering mode

I am running version 0.11

Additional information:

pwaldo@office:~$ /usr/local/bin/exiv2 '/home/pwaldo/Projects/photo/hdr-test/terra-and-chest/CRW_6868.CRW'
Filename : /home/pwaldo/Projects/photo/hdr-test/terra-and-chest/CRW_6868.CRW
Filesize : 5854446 Bytes
Camera make : Canon
Camera model : Canon EOS DIGITAL REBEL
Image timestamp : 2006:10:15 10:09:34
Image number : 168-6868
Exposure time : 1/102 s
Aperture : F15
Exposure bias :
Flash :
Flash bias : 0 EV
Focal length :
Subject distance: 314
ISO speed : 100
Exposure mode : Shutter priority (Tv)
Metering mode :
Macro mode : (0)
Image quality : RAW
Exif Resolution : 3072 x 2048
White balance : Auto
Thumbnail : None
Copyright :
Exif comment :

pwaldo@office:~$ /usr/local/bin/exiv2 -V
Exiv2 0.11
...

exiv2-0.18-crwfl.patch (3.4 KB) Artis Rozentāls, 06 Feb 2009 22:44

Associated revisions

Revision 1748
Added by Andreas Huggel 396 days ago

#494: Added Exif.Canon.FocalLength (Artis Rozentals).

History

Updated by Andreas Huggel 1215 days ago

Only limited information is known about Exif in CRW. The complete Exif data should be available in the THM file generated together with the CRW file. Use that.

I'll use this bug report to look through exiftool's implementation and update exiv2 if necessary.

http://www.sno.phy.queensu.ca/~phil/exiftool/canon_raw.html
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/CanonRaw.html#FlashInfo

Updated by fabien - 968 days ago

Hello,
I can confirm the problem...
It is pretty annoying as in digiKam, only the crw files are kept. So, we can't see the focal length used in RAW files.
I can confirm that exiftool is able to read it.

Updated by Artis Rozentāls 399 days ago

Patch for displaying focal length. Only tested with PowerShot s60 raw files.

Updated by Andreas Huggel 395 days ago

Artis Rozentāls wrote:

Patch for displaying focal length. Only tested with PowerShot s60 raw files.

Thanks! Checked-in with r1748 with only minor changes

-ahu.

Also available in: Atom PDF