Re: [darktable-dev] darktable accessing lensfun issues

[Andreas Schneider]

On Wednesday, 25 April 2018 17:27:02 CEST Daudi Amani wrote:
> Ubuntu darktable distro version is too old. only DT 2.4.2 can handle Nikon
> D5600.

If you use a newer darktable package, ask the maintainer to update lensfun too 
and have darktable built against it.

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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

Ubuntu darktable distro version is too old. only DT 2.4.2 can handle Nikon
D5600.

On Wed, Apr 25, 2018 at 2:49 AM Andreas Schneider 
wrote:

> On Tuesday, 24 April 2018 19:07:38 CEST Daudi Amani wrote:
> > Andreas,
> > what would you recommend for me? Fresh install of darktable followed by
> > install of lensfun 0.3.1?
>
> Install darktable and lensfun from the packages provided by your distro.
> Open
> bugs if you need newer lensfun that it gets updated and packages are built
> against a newer version of lensfun.
>
> --
> Andreas Schneider   GPG-ID: CC014E3D
> www.cryptomilk.orga...@cryptomilk.org
>
>
>

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Re: [darktable-dev] darktable accessing lensfun issues

[Andreas Schneider]

On Tuesday, 24 April 2018 19:07:38 CEST Daudi Amani wrote:
> Andreas,
> what would you recommend for me? Fresh install of darktable followed by
> install of lensfun 0.3.1?

Install darktable and lensfun from the packages provided by your distro. Open 
bugs if you need newer lensfun that it gets updated and packages are built 
against a newer version of lensfun.

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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

Andreas,
what would you recommend for me? Fresh install of darktable followed by
install of lensfun 0.3.1?

On Tue, Apr 24, 2018 at 9:31 AM Andreas Schneider 
wrote:

> On Tuesday, 24 April 2018 17:36:52 CEST Daudi Amani wrote:
> > Andreas,
>
> Hi Daudi,
>
> > Thank you for your insight. However, if you see the start of the thread,
> I
> > originally only used the darktable 2.4.2 package from PPA and there were
> no
> > lens data being accessed leading me to assume that there was no lensfun
> > attached to the distribution of darktable 2.4.2 when picked up via PPA.
> So
> > if you are correct, then there is indeed an issue with DT 2.4.2 since it
> is
> > not yielding lens correction data, no dropdown list.
>
> there seems to be an incompatible change between lensfun 0.3.1 and lensfun
> 0.3.2. I thinks lensfun needs to bump the soversion to address the issue
> correctly. It looks like they broke at least the ABI between those
> versions.
>
>
> Cheers,
>
>
> Andreas
>
> --
> Andreas Schneider   GPG-ID: CC014E3D
> www.cryptomilk.orga...@cryptomilk.org
>
>
>

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Re: [darktable-dev] darktable accessing lensfun issues

[Andreas Schneider]

On Tuesday, 24 April 2018 17:36:52 CEST Daudi Amani wrote:
> Andreas,

Hi Daudi,

> Thank you for your insight. However, if you see the start of the thread, I
> originally only used the darktable 2.4.2 package from PPA and there were no
> lens data being accessed leading me to assume that there was no lensfun
> attached to the distribution of darktable 2.4.2 when picked up via PPA. So
> if you are correct, then there is indeed an issue with DT 2.4.2 since it is
> not yielding lens correction data, no dropdown list.

there seems to be an incompatible change between lensfun 0.3.1 and lensfun 
0.3.2. I thinks lensfun needs to bump the soversion to address the issue 
correctly. It looks like they broke at least the ABI between those versions.


Cheers,


Andreas

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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

Andreas,
Thank you for your insight. However, if you see the start of the thread, I
originally only used the darktable 2.4.2 package from PPA and there were no
lens data being accessed leading me to assume that there was no lensfun
attached to the distribution of darktable 2.4.2 when picked up via PPA. So
if you are correct, then there is indeed an issue with DT 2.4.2 since it is
not yielding lens correction data, no dropdown list.

On Mon, Apr 23, 2018 at 10:32 PM Andreas Schneider 
wrote:

> On Tuesday, 24 April 2018 04:33:12 CEST Daudi Amani wrote:
> > 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-
> > $  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
>
> Is it possible that there is a misunderstanding how packaging in
> distributions
> works?
>
> If you want to update lensfun to a newer version you **have** to compile
> darktable against that new version too! And not only darktable every
> package
> which links against the lensfun library, e.g. hugin!
>
> The darktable debian package is built against a specific lensfuns version
> which is packaged as debian package too. If you build lensfun on your own
> and
> then install darktable again, darktable still has been built against a
> specific lensfun version. It is likely that there are incompatible changes
> between lensfun versions, so darktable will not work.
>
> Talk to the maintainers to do an update of lensfun in debian so that
> darktable
> and other packages are linked against a newer version.
>
>
>
> Andreas
>
>
>

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Re: [darktable-dev] darktable accessing lensfun issues

[Andreas Schneider]

On Tuesday, 24 April 2018 04:33:12 CEST Daudi Amani wrote:
> 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-
> $  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

Is it possible that there is a misunderstanding how packaging in distributions 
works?

If you want to update lensfun to a newer version you **have** to compile 
darktable against that new version too! And not only darktable every package 
which links against the lensfun library, e.g. hugin!

The darktable debian package is built against a specific lensfuns version 
which is packaged as debian package too. If you build lensfun on your own and 
then install darktable again, darktable still has been built against a 
specific lensfun version. It is likely that there are incompatible changes 
between lensfun versions, so darktable will not work.

Talk to the maintainers to do an update of lensfun in debian so that darktable 
and other packages are linked against a newer version.



Andreas


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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

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-
$  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 
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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Re: [darktable-dev] darktable accessing lensfun issues

[Stefan Peter]

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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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

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).
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.

On Sun, Apr 22, 2018 at 3:13 AM Tobias Ellinghaus  wrote:

> Am Samstag, 21. April 2018, 18:46:36 CEST schrieb Daudi Amani:
> > If I simply install DT 2.4.2 without installing lensfun-0.3.2, there is
> NO
> > lens correction data and no way to choose a lens. It's unclear from DT
> > documentation what IS expected re lensfun: what version? what
> installation
> > order? what locations? DT also does not give any status as to how it
> views
> > lensfun? what version does it see?
>
> If the version of lensfun your copy of dt was built with is too old for
> your
> lens you can either try to manually copy the new data over or install the
> new
> lensfun and then compile dt for it. Alternatively you can look for some
> package that already does so. Like Pascal's PPA. It comes with a patched
> copy
> of lensfun.
>
> > On Sat, Apr 21, 2018 at 7:04 AM Tobias Ellinghaus  wrote:
> > > Am Donnerstag, 19. April 2018, 04:40:18 CEST schrieb Daudi Amani:
> > > > i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am
> able to
> > >
> > > That sounds like the problem: You are not using the version of lensfun
> > > darktable was compiled against. That will result in arbitrarily broken
> > > lens
> > > correction behaviour.
> > >
> > > [...]
> > >
> > > Tobias
> >
> >
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Re: [darktable-dev] darktable accessing lensfun issues

[Tobias Ellinghaus]

Am Samstag, 21. April 2018, 18:46:36 CEST schrieb Daudi Amani:
> If I simply install DT 2.4.2 without installing lensfun-0.3.2, there is NO
> lens correction data and no way to choose a lens. It's unclear from DT
> documentation what IS expected re lensfun: what version? what installation
> order? what locations? DT also does not give any status as to how it views
> lensfun? what version does it see?

If the version of lensfun your copy of dt was built with is too old for your 
lens you can either try to manually copy the new data over or install the new 
lensfun and then compile dt for it. Alternatively you can look for some 
package that already does so. Like Pascal's PPA. It comes with a patched copy 
of lensfun.

> On Sat, Apr 21, 2018 at 7:04 AM Tobias Ellinghaus  wrote:
> > Am Donnerstag, 19. April 2018, 04:40:18 CEST schrieb Daudi Amani:
> > > i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am able to
> > 
> > That sounds like the problem: You are not using the version of lensfun
> > darktable was compiled against. That will result in arbitrarily broken
> > lens
> > correction behaviour.
> > 
> > [...]
> > 
> > Tobias
> 
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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

If I simply install DT 2.4.2 without installing lensfun-0.3.2, there is NO
lens correction data and no way to choose a lens. It's unclear from DT
documentation what IS expected re lensfun: what version? what installation
order? what locations? DT also does not give any status as to how it views
lensfun? what version does it see?

On Sat, Apr 21, 2018 at 7:04 AM Tobias Ellinghaus  wrote:

> Am Donnerstag, 19. April 2018, 04:40:18 CEST schrieb Daudi Amani:
> > i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am able to
>
> That sounds like the problem: You are not using the version of lensfun
> darktable was compiled against. That will result in arbitrarily broken
> lens
> correction behaviour.
>
> [...]
>
> Tobias

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Re: [darktable-dev] darktable accessing lensfun issues

[Tobias Ellinghaus]

Am Donnerstag, 19. April 2018, 04:40:18 CEST schrieb Daudi Amani:
> i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am able to

That sounds like the problem: You are not using the version of lensfun 
darktable was compiled against. That will result in arbitrarily broken lens 
correction behaviour.

[...]

Tobias

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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

yes: two lenses are in lensfun-data.
yes, I know that update-data provides more. My issue has nothing to do with
lensfun data, but rather with Darktable 1) finding the lens and getting the
correction data; 2) perseverance of the lens selected; 3) showing a list of
other lenses to choose from; 4) able to do #2 #3 even for a manual non-CPU
lens.

On Wed, Apr 18, 2018 at 8:54 PM Patrick Shanahan  wrote:

> * Daudi Amani  [04-18-18 22:43]:
> > i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am able to
> > verify the lens data if I select the lens ... unfortunately, Darktable is
> > NOT providing any persistence to the selected lens. It should be
> > remembering my lens choice in the .xmp file. Nor is Darktable supplying
> me
> > a list of choices of lens. As the screenshot shows, I am only given ONE
> > choice, which indeed is the lens designated in EXIF. However, in the case
> > of a manual non-CPU lens, I am NOT given ANY choices.
> > BTW: A careful reading of the reported issue will show that it not
> merely a
> > lensfun data issue.
> >
> > On Wed, Apr 18, 2018 at 9:29 AM Patrick Shanahan 
> wrote:
> >
> > > * Daudi Amani  [04-18-18 12:21]:
> > > > Issue: Darktable is not automatically recognizing lens and
> correcting.
> > > > Further, DT doesn't show a list of possible lenses to choose from
> which
> > > is
> > > > desirable when using a manual non-CPU lens.
> > > >
> > > > Behavior:
> > > > 1) each time an image is selected, DT shows (screenshot)
> > > >
> > > > 2) when I click the down-triangle to the right of the lens, it
> > > immediately
> > > > finds the correct lens (but still doesn't show me a list of all
> lenses
> > > like
> > > > DT older versions used to do) (screenshot).
> > > >
> > > > 3) then when I select the choice given, it fills out corrections:
> > > >
> > > > 4) BUT, if I select a different image and then come back to this
> one, it
> > > no
> > > > longer remembers the lens which I had selected and the entire process
> > > must
> > > > be manually repeated. Of course, if I close DT, then reopen, it
> doesn't
> > > > remember either.
> > > >
> > > > 5) Never does it give me an option to view a list of all available
> lens
> > > > choices.
> > > >
> > > >
> > > > camera: I'm using a Nikon D5600 in RAW mode with one of three lens:
> > > Nikkor
> > > > 18-55mm, Nikkor 55-200mm, legacy (non-CPU) Nikkor 135mm.
> > > >
> > > > Darktable v2.4.2
> > > > Lensfun 0.3.2
> > > > OS: Ubuntu 16.04
> > >
> > > did you try lensfun-update-data
> > >
> > >
> > >
> > >
> > > --
> > > (paka)Patrick Shanahan   Plainfield, Indiana, USA
> @ptilopteri
> > > http://en.opensuse.orgopenSUSE Community Member
> facebook/ptilopteri
> > > Registered Linux User #207535@
> http://linuxcounter.net
> > > Photos: http://wahoo.no-ip.org/piwigo   paka @ IRCnet
> freenode
> > >
> ___
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> > >
> > >
> >
> >
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>
> you lense[s] is/are in the lensfun-data?
>
> and you know that lensfun-update-data provides you newer lenses than the
> install package?
>
> and it's idenity matches exif data?
>
> aiui, dt *only* uses the data available in the lensfun package.
>
> --
> (paka)Patrick Shanahan   Plainfield, Indiana, USA  @ptilopteri
> http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri
> Registered Linux User #207535@ http://linuxcounter.net
> Photos: http://wahoo.no-ip.org/piwigo   paka @ IRCnet freenode
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Re: [darktable-dev] darktable accessing lensfun issues

[Patrick Shanahan]

* Daudi Amani  [04-18-18 22:43]:
> i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am able to
> verify the lens data if I select the lens ... unfortunately, Darktable is
> NOT providing any persistence to the selected lens. It should be
> remembering my lens choice in the .xmp file. Nor is Darktable supplying me
> a list of choices of lens. As the screenshot shows, I am only given ONE
> choice, which indeed is the lens designated in EXIF. However, in the case
> of a manual non-CPU lens, I am NOT given ANY choices.
> BTW: A careful reading of the reported issue will show that it not merely a
> lensfun data issue.
> 
> On Wed, Apr 18, 2018 at 9:29 AM Patrick Shanahan  wrote:
> 
> > * Daudi Amani  [04-18-18 12:21]:
> > > Issue: Darktable is not automatically recognizing lens and correcting.
> > > Further, DT doesn't show a list of possible lenses to choose from which
> > is
> > > desirable when using a manual non-CPU lens.
> > >
> > > Behavior:
> > > 1) each time an image is selected, DT shows (screenshot)
> > >
> > > 2) when I click the down-triangle to the right of the lens, it
> > immediately
> > > finds the correct lens (but still doesn't show me a list of all lenses
> > like
> > > DT older versions used to do) (screenshot).
> > >
> > > 3) then when I select the choice given, it fills out corrections:
> > >
> > > 4) BUT, if I select a different image and then come back to this one, it
> > no
> > > longer remembers the lens which I had selected and the entire process
> > must
> > > be manually repeated. Of course, if I close DT, then reopen, it doesn't
> > > remember either.
> > >
> > > 5) Never does it give me an option to view a list of all available lens
> > > choices.
> > >
> > >
> > > camera: I'm using a Nikon D5600 in RAW mode with one of three lens:
> > Nikkor
> > > 18-55mm, Nikkor 55-200mm, legacy (non-CPU) Nikkor 135mm.
> > >
> > > Darktable v2.4.2
> > > Lensfun 0.3.2
> > > OS: Ubuntu 16.04
> >
> > did you try lensfun-update-data
> >
> >
> >
> >
> > --
> > (paka)Patrick Shanahan   Plainfield, Indiana, USA  @ptilopteri
> > http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri
> > Registered Linux User #207535@ http://linuxcounter.net
> > Photos: http://wahoo.no-ip.org/piwigo   paka @ IRCnet freenode
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> >
> >
> 
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you lense[s] is/are in the lensfun-data?

and you know that lensfun-update-data provides you newer lenses than the
install package?

and it's idenity matches exif data?

aiui, dt *only* uses the data available in the lensfun package.

-- 
(paka)Patrick Shanahan   Plainfield, Indiana, USA  @ptilopteri
http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri
Registered Linux User #207535@ http://linuxcounter.net
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Re: [darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

i installed lensfun-0.3.2 AFTER installing Darktable 2.4.2. I am able to
verify the lens data if I select the lens ... unfortunately, Darktable is
NOT providing any persistence to the selected lens. It should be
remembering my lens choice in the .xmp file. Nor is Darktable supplying me
a list of choices of lens. As the screenshot shows, I am only given ONE
choice, which indeed is the lens designated in EXIF. However, in the case
of a manual non-CPU lens, I am NOT given ANY choices.
BTW: A careful reading of the reported issue will show that it not merely a
lensfun data issue.

On Wed, Apr 18, 2018 at 9:29 AM Patrick Shanahan  wrote:

> * Daudi Amani  [04-18-18 12:21]:
> > Issue: Darktable is not automatically recognizing lens and correcting.
> > Further, DT doesn't show a list of possible lenses to choose from which
> is
> > desirable when using a manual non-CPU lens.
> >
> > Behavior:
> > 1) each time an image is selected, DT shows (screenshot)
> >
> > 2) when I click the down-triangle to the right of the lens, it
> immediately
> > finds the correct lens (but still doesn't show me a list of all lenses
> like
> > DT older versions used to do) (screenshot).
> >
> > 3) then when I select the choice given, it fills out corrections:
> >
> > 4) BUT, if I select a different image and then come back to this one, it
> no
> > longer remembers the lens which I had selected and the entire process
> must
> > be manually repeated. Of course, if I close DT, then reopen, it doesn't
> > remember either.
> >
> > 5) Never does it give me an option to view a list of all available lens
> > choices.
> >
> >
> > camera: I'm using a Nikon D5600 in RAW mode with one of three lens:
> Nikkor
> > 18-55mm, Nikkor 55-200mm, legacy (non-CPU) Nikkor 135mm.
> >
> > Darktable v2.4.2
> > Lensfun 0.3.2
> > OS: Ubuntu 16.04
>
> did you try lensfun-update-data
>
>
>
>
> --
> (paka)Patrick Shanahan   Plainfield, Indiana, USA  @ptilopteri
> http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri
> Registered Linux User #207535@ http://linuxcounter.net
> Photos: http://wahoo.no-ip.org/piwigo   paka @ IRCnet freenode
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>

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Re: [darktable-dev] darktable accessing lensfun issues

[Mark Feit]

On 4/18/18 12:29 PM, Patrick Shanahan wrote:

did you try lensfun-update-data


For what it's worth, I have the same problem and have verified that the 
lensfun data is current.


--Mark

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Re: [darktable-dev] darktable accessing lensfun issues

[Patrick Shanahan]

* Daudi Amani  [04-18-18 12:21]:
> Issue: Darktable is not automatically recognizing lens and correcting.
> Further, DT doesn't show a list of possible lenses to choose from which is
> desirable when using a manual non-CPU lens.
> 
> Behavior:
> 1) each time an image is selected, DT shows (screenshot)
> 
> 2) when I click the down-triangle to the right of the lens, it immediately
> finds the correct lens (but still doesn't show me a list of all lenses like
> DT older versions used to do) (screenshot).
> 
> 3) then when I select the choice given, it fills out corrections:
> 
> 4) BUT, if I select a different image and then come back to this one, it no
> longer remembers the lens which I had selected and the entire process must
> be manually repeated. Of course, if I close DT, then reopen, it doesn't
> remember either.
> 
> 5) Never does it give me an option to view a list of all available lens
> choices.
> 
> 
> camera: I'm using a Nikon D5600 in RAW mode with one of three lens: Nikkor
> 18-55mm, Nikkor 55-200mm, legacy (non-CPU) Nikkor 135mm.
> 
> Darktable v2.4.2
> Lensfun 0.3.2
> OS: Ubuntu 16.04

did you try lensfun-update-data




-- 
(paka)Patrick Shanahan   Plainfield, Indiana, USA  @ptilopteri
http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri
Registered Linux User #207535@ http://linuxcounter.net
Photos: http://wahoo.no-ip.org/piwigo   paka @ IRCnet freenode
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[darktable-dev] darktable accessing lensfun issues

[Daudi Amani]

Issue: Darktable is not automatically recognizing lens and correcting.
Further, DT doesn't show a list of possible lenses to choose from which is
desirable when using a manual non-CPU lens.

Behavior:
1) each time an image is selected, DT shows (screenshot)

2) when I click the down-triangle to the right of the lens, it immediately
finds the correct lens (but still doesn't show me a list of all lenses like
DT older versions used to do) (screenshot).

3) then when I select the choice given, it fills out corrections:

4) BUT, if I select a different image and then come back to this one, it no
longer remembers the lens which I had selected and the entire process must
be manually repeated. Of course, if I close DT, then reopen, it doesn't
remember either.

5) Never does it give me an option to view a list of all available lens
choices.


camera: I'm using a Nikon D5600 in RAW mode with one of three lens: Nikkor
18-55mm, Nikkor 55-200mm, legacy (non-CPU) Nikkor 135mm.

Darktable v2.4.2
Lensfun 0.3.2
OS: Ubuntu 16.04

EXIF data:
$ exiftool 0DA_1754.NEF | grep Lens
Lens Type   : G VR
Lens: 18-55mm f/3.5-5.6
Lens Data Version   : 0204
Lens ID Number  : 162
Lens F Stops: 5.33
Lens ID : AF-S DX VR Nikkor 18-55mm f/3.5-5.6G II
Lens: 18-55mm f/3.5-5.6 G VR

$ exiftool 0DA_1758.NEF | grep Lens
Lens Type   : G
Lens: 55-200mm f/4-5.6
Lens Data Version   : 0204
Lens ID Number  : 137
Lens F Stops: 5.00
Lens ID : AF-S DX Zoom-Nikkor 55-200mm f/4-5.6G ED
Lens: 55-200mm f/4-5.6 G

I've updated the .xmp lensfun data to exactly match above entries but to
no avail re this issue.

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