Hi,
I've got a new Tamron 17-50 lens and I tried out Darktables lens correction
for it today which apparantly uses the lensfun library. Unfortunately the
CA correction doesn't work well at all, sometimes it makes the CAs even
worse. Example:
http://pasteboard.co/2M5do72i.jpg (original)
http://pasteboard.co/2M5ehyh7.jpg (CA correction of the lens correction
module)
There is a standalone CA correction module in darktable which doesn't use
the lensfun library that works much better even though it doesn't know
which lens I'm using: http://pasteboard.co/2M5ew83m.jpg
So I assume there's a bug in lensfun.
If you need the raw file:
https://mega.co.nz/#!WU433RwZ!Cg42uzAtBaTbWiI7dyqwSGwIoaEq5a5z1LLt37nwtO0
Thank you in advance!
Knuth Dethlef
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