Bug #494

Some EXIF data not retrieved from Canon RAW files

Added by Paul Waldo over 10 years ago. Updated about 1 year ago.

Status:ClosedStart date:
Priority:NormalDue date:
Assignee:Robin Mills% Done:

100%

Category:withdrawnEstimated time:1.00 hour
Target version:0.26

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 Magnifier (3.42 KB) Artis Rozentāls, 06 Feb 2009 22:44

Associated revisions

Revision 1748
Added by Andreas Huggel over 8 years ago

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

History

#1 Updated by Andreas Huggel over 10 years 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

#2 Updated by fabien - almost 10 years 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.

#3 Updated by Artis Rozentāls over 8 years ago

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

#4 Updated by Andreas Huggel over 8 years 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.

#5 Updated by Robin Mills almost 2 years ago

  • Target version set to 53

#6 Updated by Robin Mills about 1 year ago

  • Status changed from New to Assigned
  • Assignee set to Robin Mills

This issue has been in the database for 9 years and nobody else has requested progress with this matter. So, unless you engage to persuade me to keep this matter alive, it will be closed on April 30 as "no longer needed/wanted".

#7 Updated by Robin Mills about 1 year ago

  • Category changed from exif to withdrawn
  • Status changed from Assigned to Closed
  • Target version changed from 53 to 0.26
  • % Done changed from 0 to 100
  • Estimated time set to 1.00

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