Make sure that what you want to correct is actually correctable with a lens profile. There seems to be some confusion about this amongst people submitting phone images in particular. The RAW files from my S6, for example, are already quite rectilinear.Īlso, calibration images must be in RAW formats for RAW-capable cameras because many modern cameras (eg, Fuji) automatically correct lens imperfections when generating JPEGs. To do this, reduce the correction slider after having performed the automatic correction. In some cases you can obtain a more natural looking image if you correct vertical distortions to an 80 90 level rather than to the maximum extent. When I simply enable it, the correct parameters (such as aperture and focal length) are properly applied from the photo's EXIF data. lens shift (vertical) Correct converging vertical lines (i.e. It always defaults to being off by default.
Darktable lens correction how to#
If you can't (or don't want to) figure out how to calibrate your lens (it's not easy, and this is the approach I've taken in the past), you can send calibration images to Torsten Bronger. He will send the calibration data to both you and the lensfun maintainers. I seem to be digging myself into a deep hole trying to get lens correction to automatically be applied to my photos correctly.
> 2 Some of the lenses were talking about were developed and (partially) > targeted to FF cameras having a sensor with less MP than a current APS-C > (for example in Canon, the 6D is a 2012 FF. Torsten Bronger's Lens calibration tutorial A lens quality and specs is not defined by MP resolution (rather by like > purity of the glass, glass curvature homogeneity, CoC, TCA, and so on). If your lens is not supported, you can read about how to calibrate it: RawTherapee, darktable, and other programs use lensfun for lens correction. If your lens appears to be absent from the database.Ĭheck the Lensfun coverage database to make sure it really hasn't been added yet. If it's already there, you may need to update your local copy ( sudo lensfun-update-data).
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