Dear Stefan,
Thank you for the more detailed and actionable information. Based on your
information, here is what I have done and the results:
1. $ sudo apt-get remove darktable
2. download lensfun-0.2.8.tar.gz, extract to my home directory, make &
install per instructions for Ubuntu 16.04
$ cd lensfun-<version>
$ mkdir cmake_build
$ cd cmake_build/
$ sudo cmake -DCMAKE_BUILD_TYPE=Release -DLENSFUN_INSTALL_PREFIX=/usr ../
$ sudo make
$ sudo make install
3. $ sudo apt-get install darktable
this installs darktable 2.4.2 from the PPA
4. test by opening my .NEF raw file for a photo
5. lens correction module shows the name of the lens ("Nikon AF-S DX VR
Nikkor 18-55mm f/3.5 ...") but displays error message: "camera/lens not
found please select manually"
*HOWEVER: there is NO dropdown list of possible lenses* (as in past
Darktable versions).
6. $ sudo lensfun-update-data
7. repeat steps 4, 5: *same results* (in particular, no dropdown list of
possible lenses)
8. edit data/db/slr-nikon.xmp, adds in specific correction data for my lens
9. repeat steps 4, 5: *same results* (in particular, no dropdown list of
possible lenses)
*conclusion*:
worse than when I used lensfun-0.3.2 with darktable 2.4.2 which at least
would show and allow the lens to be selected and populate correction data
even though there was no permanence and even though it would not show all
other lenses.
*suggestion*:
It would be helpful if there were specific Darktable instructions in
Darktable Manual re lensfun, expected version, expected database locations,
expected behavrior; etc.
But based on the information people are giving here on the dev channel, and
my attempts to duplicate their instructions,
*respectfully I submit that Darktable 2.4.2 is:*
* not seeing/connecting with lensfun (both 0.2.8 and 0.3.2)
* not retrieving lens correction data automatically
* not displaying a dropdown list of all possible lenses to choose from
* not remembering any selected lens (permanence issue) and not retrieving
when accessing xmp data for a photo
On Sun, Apr 22, 2018 at 10:43 PM Stefan Peter <s_pe...@swissonline.ch>
wrote:
> Dear Daudi Amani
>
> On 23.04.2018 06:16, Daudi Amani wrote:
> > Tobias, although I appreciate your effort to help me, your information
> > doesn't address either of my issues.
> > Issue 1: installing DT2.4.2 directly from DT PPA does not seem to
> > install lensfun (any version).
>
> DT from Pascals PPA depends on
> liblensfun0 (>= 0.2.8)
>
> So, in order to be able to install DT, a suitable version of lensfun has
> to be installed, too. If this is not possible, the installation of DT
> will fail.
>
>
> > Issue 2: installing lensfun 0.3.2 either before or after installation of
> > DT 2.4.2 yields the problems I first reported: no drop-down list of lens
> > choices AND no persistence of selection.
>
> This is because DT depends on liblensfun0 and you installed liblensfun1.
> And liblensfun1 most probably will clash with liblensfun0 so this gets
> deinstalled or simply broken.
>
> With kind regards
>
> Stefan Peter
>
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