To clarify, I'm not suggesting that this feature would affect the RAW file. It would be applied in the same way as the perspective distortion control - i.e. non-destructive and additive within a processing session.
The feature is available in most of the RAW development tools I've used, from those bundled with cameras to Lightroom, ON1, Capture One, Aftershot Pro 3 etc. None of those applications affect the RAW file. In the case of Lightroom, I believe the adjustments are stored within the image database and/or XMP sidecar file. I'm not sure how adjustments are saved in Darktable, but imagine it's something similar.
One further point re my lenses - I should have mentioned that I collect vintage lenses, and have a large number including some quite obscure models. It would take me months, perhaps years, to take test shots for all of them, and presumably a long time for the profiles to be created.
Thanks again.
Mike
Sent: Wednesday, November 15, 2017 at 10:25 AM
From: "Jean-Luc Coulon (f5ibh)" <jean.luc.cou...@gmail.com>
To: No recipient address
Cc: darktable <darktable-dev@lists.darktable.org>
Subject: Re: [darktable-dev] Manual lens corrections - feature request
From: "Jean-Luc Coulon (f5ibh)" <jean.luc.cou...@gmail.com>
To: No recipient address
Cc: darktable <darktable-dev@lists.darktable.org>
Subject: Re: [darktable-dev] Manual lens corrections - feature request
Hi,
Personnaly, I think it is a bad idea [tm] to include anything in the raw file.
If you change your mind, you cannot get back...
This kind of feature is very handy for jpeg shoot but even then it depends of what you do with the jpeg: direct sharing/printing/hosting or if you want to process it a bit later.
Jean-Luc
2017-11-15 10:44 GMT+01:00 Heiko Bauke <heiko.ba...@mail.de>:
Hi,
Am 14.11.2017 um 20:39 schrieb bigmack...@mail.com:New user here, so apologies if I'm posting to the wrong list!
I've just switched fully from Lightroom 6 to Darktable 2.2.5 under Linux. Kudos to the developers - it's superb.
The one and only feature I'm missing in Darktable is the ability to adjust for barrel or pincushion distortion manually. I realise lenses can be profiled for the "Lens Correction" module, but this is time consuming and doesn't allow for fine tuning of distortion to my own tastes (sometimes I don't want to fully correct, or I may perhaps add in a little distortion). At present, I have to export my files to TIFF, open them in GIMP and carry out adjustments in GIMP's "Lens Distortion" feature. This makes no sense when other correction features are provided within Darktable itself.
darktable-dev+unsubscr...@lists.darktable.org
yes this might be a useful feature, especially for those who shoot with exotic lenses.
In case that you take pictures with Sony cameras: There is a camera app that does manual lens correction (peripheral shading, chromatic aberration and distortion) in camera. All corrections are included in the RAW file.
https://www.youtube.com/watch?v=CWe_ePAHSfk
Heiko
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