Hi, I was just fiddling with lens correction on an image taken with my Pentax K5II and a Samyang 14mm/2.8 lens.
In the lens correction module it comes up with "Pentax K-5 II" for the camera, and "A Series Lens" for the lens, and applies no noticeable distortion corrections. If I change the camera to another Pentax APS-C camera (or a Generic 1.5x camera), suddenly it applies a pretty good pincushion correction. How can this be, when darktable has apparently not identified my lens? This lens does not communicate electronically with the camera. I told the camera the focal length was 15mm (as it has no 14mm option) and this is reflected in the exif data. Has darktable somehow just made a reasonable guess at how much pincushion a 15mm lens on APS-C will have ?? I will make the effort to calibrate the lens and submit it to LensFun but I am just curious what's going on here and where darktable is getting its correction parameters from in this instance. I am using darktable 1.1+1175~g2434bf0. Secondly it won't let me choose any other lens unless I select a camera other than the automatic "Pentax K-5 II". Thanks in advance Russell ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
