Hi, thanks for the profile. I checked it against a batch of images from a
review taken at different distances, and it seemed to slightly over-correct at
the furthest end of the range, so I made a slight adjustment. The attached copy
is what I plan to add to the database, unless you find that seems to not
correct enough near infinity focus. It will, of course, not produce full
correction at closer ranges, but I feel that it's more important for the
profiles in the database to avoid over-correcting for reasonable cases.
--
jys
On Mon, Dec 18, 2017, at 13:10, Matthias Vaupel wrote:
> Hello,
>
> I have prepared a new entry of the new Laowa ultra wide lens for the
> lens database by means of manual distortion correction in Hugin and TCA
> correction in Darktable.
>
> Best regards, Matthias
<lensdatabase>
<lens>
<maker>Venus Optics</maker>
<model>Laowa 7.5mmF2.0</model>
<focal value="7.5" />
<mount>Micro 4/3 System</mount>
<cropfactor>2</cropfactor>
<calibration>
<distortion focal="7.5" model="ptlens" a="0" b="-0.007" c="0" />
<tca focal="7.5" model="poly3" vb="1.0004" vr="1.0004" />
<field_of_view focal="7.5" fov="98.1678" />
</calibration>
</lens>
</lensdatabase>
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