Bug 238285

Summary:	Nikkor 18-200mm not detected by lens autocorrection
Product:	[Applications] digikam	Reporter:	humufr
Component:	Metadata-Exif	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	caulier.gilles, tschenser
Priority:	NOR
Version:	1.2.0
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed In:	1.4.0
Sentry Crash Report:
Attachments:	exif file

Description humufr 2010-05-20 11:56:55 UTC

Version:           1.2.0 (using 4.4.3 (KDE 4.4.3), KDE:KDE4:Factory:Desktop / openSUSE_11.1)
Compiler:          gcc
OS:                Linux (x86_64) release 2.6.27.45-0.1-default

Digikam does have a problem to read the exif metadata from my lens. The lens is a nikkor 18-200mm but the one proposed by the lens autocorrection is nikkor 24-85mm. I join one exif file saved with digikam so you can have the information.

Comment 1 humufr 2010-05-20 11:57:31 UTC

Created attachment 43744 [details]
exif file

Comment 2 caulier.gilles 2010-05-20 19:18:44 UTC

This problem is fully relevant of Exiv2 library. digiKam already extract Nikon Lens info from Makernotes, but if Exiv2 don't know this lens in the list, it will not work.

http://lxr.kde.org/source/extragear/graphics/digikam/libs/dmetadata/dmetadata.cpp#960

Which Exiv2 release you use exactly ?

Gilles Caulier

Comment 3 Jens Mueller 2010-05-20 19:53:48 UTC

Beside your exiv2 version, is the lens name listed in photo properties (left sidebar)? Is the lens listed in lens selector in autocorrection plugin (lensfun-db)?

I extended lensfun searches for digikam 1.3 (fully nikon relevant), so I assume your problem is fixed in current svn.

Could you please attach a downsized jpeg image with full makernotes, I'm not able to open the previous one.

Regards, Jens

Comment 4 Jens Mueller 2010-05-20 23:22:47 UTC

I just tried this one: http://www.flickr.com/photos/kadath/3479009372/in/set-72157617186639099/ 

With digikam 1.3svn lensfun 2.5svn and exiv2 0.19svn the lens is selected in autocorrection tool.

With digikam 1.2 lensfun 2.3 and exiv 0.19 the lens is listed in autocorrection drop down list but lens name is not decoded and therefore right lens could not be selected.

One problem for future use could be that the lensid of the 'Nikkor 18-200mm f/3.5-5.6G IF-ED' is the same than the new II version.

Jens

Comment 5 caulier.gilles 2010-06-07 10:10:14 UTC

Jens,

Do you manage this entry for the future ?

Gilles Caulier

Comment 6 Jens Mueller 2010-06-07 22:28:14 UTC

I think this entry can be closed with release 1.3 (additional lensfun searches). I tested various different nikon lenses, and none of them is not selected when there is a lensfun entry. 
The Nikkor 18-200mm f/3.5-5.6G IF-ED exists in two versions, the newer one with a better VR, but I don't know if optical design and therefore correction params have been changed.