Bug #1368: Canon EF-M 15-45 broken LensType - Exiv2

Bug #1368

Canon EF-M 15-45 broken LensType

Added by Peter Wemmert about 3 years ago. Updated about 3 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Robin Mills

Category:

not-a-bug

Target version:

0.27

Start date:

30 Sep 2018

Due date:

% Done:

100%

Estimated time:

1.00 h

Description

Worked last month in darktable but now Exiv2 (and darktable) reports (4153).
I used exiv2 -pt IMG_3934.CR2 | grep -i lens

Raw file:
https://myfile.is/M1J5r3iabc/IMG_4954_CR2

History

Updated by Robin Mills about 3 years ago

Category set to lens
Status changed from New to Assigned
Assignee set to Robin Mills
Target version set to 0.27
% Done changed from 0 to 50
Estimated time set to 1.00 h

This seems to be OK on 'master'

rmills@rmillsmbp:~/Downloads $ exiv2 -pa --grep lens/i ~/Downloads/IMG_4954.CR2 
Exif.CanonCs.LensType                        Short       1  Canon EF-M 15-45mm f/3.5-6.3 IS STM
Exif.CanonCs.Lens                            Short       3  15.0 - 45.0 mm
Exif.Photo.LensSpecification                 Rational    4  15/1 45/1 0/1 0/1
Exif.Photo.LensModel                         Ascii      29  EF-M15-45mm f/3.5-6.3 IS STM
Exif.Photo.LensSerialNumber                  Ascii      11  000002c252
576 rmills@rmillsmbp:~/Downloads $

I'm wondering if you are now using an older version of Exiv2 and/or darktable.

If you're using Exiv2 v0.26 (in libexiv2.26.dylib), you can modify the lens identification in the ~/.exiv2 file:

rmills@rmillsmbp:~/Downloads $ exiv2 -pv --grep lens/i ~/Downloads/IMG_4954.CR2 
0x0016 CanonCs      LensType                    Short       1  4153  <--- Use this ID
0x0017 CanonCs      Lens                        Short       3  45 15 1
0xa432 Photo        LensSpecification           Rational    4  15/1 45/1 0/1 0/1
0xa434 Photo        LensModel                   Ascii      29  EF-M15-45mm f/3.5-6.3 IS STM
0xa435 Photo        LensSerialNumber            Ascii      11  000002c252
rmills@rmillsmbp:~/Downloads $ 582 rmills@rmillsmbp:~/Downloads $ cat ~/.exiv2
[canon]
4153=Peter Wemmert's Lens <--- Give it a name
rmills@rmillsmbp:~/Downloads $ exiv2 -pt --grep lens/i ~/Downloads/IMG_4954.CR2 
Exif.CanonCs.LensType                        Short       1  Peter Wemmert's Lens
Exif.CanonCs.Lens                            Short       3  15.0 - 45.0 mm
Exif.Photo.LensSpecification                 Rational    4  15/1 45/1 0/1 0/1
Exif.Photo.LensModel                         Ascii      29  EF-M15-45mm f/3.5-6.3 IS STM
Exif.Photo.LensSerialNumber                  Ascii      11  000002c252
rmills@rmillsmbp:~/Downloads $

The ~/.exiv2 file is documented here: http://dev.exiv2.org/projects/exiv2/wiki/Lens_Recognition_in_Exiv2_v026_(and_later)/