Am Wed, 11 Dec 2019 21:36:41 -0800
schrieb jys <[email protected]>:

> On Fri, Dec 6, 2019, at 16:23, Аl Воgnеr wrote:
> 
> > My lens-configuration is based on this post:
> > https://github.com/lensfun/lensfun/issues/895
> 
> I cleaned up the profile from that upload, see attachment. If you can
> test it and report, I'll add it to the database.

Thanks, for a 1st test it looks good and it seems to work. But, I do
not own this camera and there was a strange behavior with darktable.
After I configured the photo manually, dt seems to remember this, even
if the xmp-file was deleted. Only a newer used photo showed the manual
lens configuration.

Since I do not have a test photo, which was never used, I cannot say it
works for sure, but I removed the xmp-file and cleaned the database. It
is different to my experiences.

I will give you feedback again, when I get a new test photo, can take a
while, because the owner is ill at the moment.

> (There are some specific little things with fixed-lens profiles that
> are needed to work right in darktable; the one that's not obvious
> from observation of examples is that the mount name should start with
> lowercase.)

Good to know.

Are you sure to use

<cropfactor>1.5</cropfactor>

After searching the net, I found

<cropfactor>1.53</cropfactor>

And I have no idea, if this makes a difference.

https://www.digicamdb.com/specs/ricoh_gr-iii/

Sensor diagonal = 28.21 mm
Crop factor = 43.27 / 28.21 = 1.53


Al
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