Its discolouration is caused by a demosiacing problem, caused by using W/A adapted lenses. The sample is small. Do you have a "maze" type pattern as well?
This is about it the problem. http://www.flickr.com/groups/1084614@N23/discuss/72157622637978730/?search=mazehttp://www.flickr.com/groups/1084614@N23/discuss/72157622637978730/?search=maze
Its because the lenses are film lenses, not designed for digital. Are you processing from a Raw file in Photoshop or Lightroom?
Previous problems have been cured by a new version of Adobe Raw converter. If the problem is from raw, then you could try another converter.
If its on the jpg. its not fixable. Its a lens mismatch
Try using the Olympus software to process the file. In the case of the problem that I linked to, this was happening on Panasonic cameras processed in Photoshop or Lightroom. It DIDN'T happen if the supplied Silkypix software was used. The Olympus raw conversion software may solve the problem.Thanks. To answer your questions, I have a maze problem in that particular zone, yes. I didn't know that but now when I look for it, it's there all right. I'm running Lightroom 2.6 with CR 5.6. Can I something about it in CR you think?
It only happens with m-mount lenses on m4/3. The same lenses are fine on the Leicas.This "Maze" effect has got to be a result of some software algorithm in the camera or post-processor running amuck trying to do some sort of anti-aliasing?
This problem does not occur when using "film lenses" on a Leica M8 (or M9), which do not have AA filters. Nor did it occur on my old color Kodak DCS series cameras.