2014-03-29 6:19 GMT+01:00 Torsten Bronger <[email protected]>:
> Hallöchen!
>
> Marie-Noëlle Augendre writes:
>
> > Purple/red fringes are somewhat less proeminent, but still
> > visible.
>
> Note that only TCA (green one edge, magenta the other) can be
> corrected with lens profiles. LCA ("purple fringing") must be
> eliminated with other tricks.
>
I think that it is TCA. I'd never heard of LCA up to now, and am not sure
how to recognize it (will goggle this).
>
> If the green/magenta TCA is still visible, you can upload sharp
> images with contrasty edges over the whole image (like
> http://wilson.bronger.org/lens_calibration_tutorial/DSC03194.jpg) at
> http://wilson.bronger.org/calibration and I improve the profile.
>
Thanks for your help. I'll do that when I'll have some time to shoot
adequate pictures.
By the way, I still have to resubmit a batch of pictures for the Canon
Powershot S100, as this camera profile is still not in lensfun libraryr.
>
>
> > As for the distorsion, I find it better (for this couple
> > lens/aperture) without.
>
> What do you mean with this? That the profile doesn't work well or
> that you like the lines still slightly bent?
>
I can see no bent lines in that picture, and the picture seems more
'natural' to me before applying the correction; but it might be because
I've never apply any correction at this focal length up to now.
>
> Tschö,
> Torsten.
>
> --
> Torsten Bronger Jabber ID: [email protected]
> or http://bronger-jmp.appspot.com
>
>
>
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