Hallöchen!

[email protected] writes:

> [...]
>
> I don't have a good understanding of optics, but I've found the
> calibration data that I made myself for a zoom lens can give
> perfect results for some images and wrong for others. The most
> obvious cases are when focus distance is very small. I wonder if
> the complexity of the various elements in some lenses means that
> proper correction would have to take focus distance into account?

Of course the focus distance is important: Lensfun's corrections
only work for focus at infinity, which is why I urge people to take
test pictures at a minimal distance.

Theoretically, Lensfun coud be expanded to take focus distance into
account, but this makes calibration much more complex, and I
personally don't think that people will do that.  But it could be
done, so if there is demand, just open a feature request.

Regards,
Torsten.

-- 
Torsten Bronger    Jabber ID: [email protected]


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