title: FAQ - frequently asked questions linktitle: FAQ layout: default weight: 6
Why is my lens or camera not automatically recognized in image editor XYZ?
There may be two reasons: 1. The camera and lens are not in the Lensfun database which is available on your computer. On Linux Lensfun is usually installed system wide by a package manager. On Windows and Mac Lensfun is usually shipped together with the image editing application. Please check for updates!
exiv2 to see if
the retrieved information is correct:
$> exiv2 -pt 2938031.jpeg |grep -i 'lens|model|make'How do I know if a certain lens and camera combination will be recognized by Lensfun?
Please check the list of supported lenses for the latest release. Before you report a missing lens, camera, or even start calibration by your own, please also check the list of lenses of the current development version at http://wilson.bronger.org/lensfun_coverage.html"> http://wilson.bronger.org/lensfun_coverage.html
My camera and lens is in the list of supported lenses but my image editor does not recognize them?
Probably the Lensfun database on your computer is out of date. On Linux, Lensfun is usually installed system wide by a package manager. On Windows and Mac, Lensfun is usually shipped together with the image editing application. Please check for updates!
My lens should be supported but the camera is missing. What can I do?
The camera entry in the database only holds crop factor and lens mount. As a workaround you can simply select any other camera with the same lens mount and sensor size or crop factor.
The lens is wrongly identified by the image editor as a different lens than I have actually used. Why?
Most open source programs today use the http://www.exiv2.org/">exiv2 library to
retrieve the camera and lens information. You can use the command line tool exiv2 to see if
the retrieved information is correct:
$> exiv2 -pt 2938031.jpeg |grep -i 'lens|model|make'
If the lens name is not correct in the above output please report a bug at the
http://dev.exiv2.org/projects/exiv2/issues">exiv2 issue tracker