On 9/16/2018 9:48 AM, Jan Steinman wrote:
From: Philippe <photo.philippe.amard@xxxxxxxxx>
Imbedded profiles do it for you Olie users, and me as a Fuji user ;-)
Yes, of course, if the profiles exist!
What LensFun and ON 1 (et. al.) does for you is let you create lens profiles
for lenses that were developed before profiles existed, like my OM Zuiko stable.
Ah, yes, that's the one I've encountered in a few apps. One person's opinion, after careful comparisons - LensFun is
significantly poorer than PTLens and DxO's lens profiles. PTLens is cheap and also allows creation of new profiles. You
take the test shots, he makes the profile. Very responsive, according to Chuck and others. There are already profiles
for most OM wides on FF, which is where I first used it. PTLens is an independent, one man show, so should fit your
criteria. His profiles are actually slightly better than DxO for some µ4/3 lenses.
Adobe also has a program for creating one's own profiles for ACR/LR, but I've
never tried it.
In particular, fast-wide legacy glass is known for excessive CA in the corners
and edges.
As Philippe says, that's mostly not an issue with a 4/3 sensor, as the outside zones are cropped off. I say this
advisedly, as I WANT those aberrations for some of my Alt photography. They weren't there with my OM lenses on µ4/3,
which is why I have an A7 for old, MF, FF lenses, LensBabies, etc.
You can manually correct for that in your favourite photo editor, or create a
LensFun profile and let your open-source-based photo editor do it for you
automagically.
Well, not quite automagically, as they can't know what MF lens you used. You do
have to tell it.
Minimally Distorted Moose
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What if the Hokey Pokey *IS* what it's all about?
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