Weird fringing

[lathspell]

Processed some Oly E-30 shots from the weekend in ASP 1.0.1.10 when I started to wonder about strange fringing in a picture taken with a lens that's not known for producing these heavy amount of fringing (ZD 50/2). Checked with 3 other raw converters (OlympusViewer 2 V1.31, CaptureOne 6.4, Lightroom 4.1 RC), and here is the result. (Screenshots taken at 200 % to better show the problem.)

All converters were set to their defaults with no CA correction of fringe removal involved. If you check the ASP output at the lower right corner you can clearly see blue and purple lines at the vertical edges of the towers plus some purple fringing in the golden bowls above. Those fringes are not visible with other converters and obviously not in the raw file, so it must be a problem with ASP. Additionally I can't get rid of them with CA correction, and even if I could it would seriously affect the overall image sharpness as this is a known problem in B5 and ASP (and a "hack" to get rid of the also known nasty B5/ASP demosaicing with Oly files) ...

[spoilerhead]

disable ASP sharpening and use Wavelet Sharpen instead

[lathspell]

Thanks! The funny thing is: even with no sharpening involved (no ASP sharpening, no WS, no USM etc.) I can see those fringes, and adding ASP sharpening makes them more visible - but somehow the use a WS/USM combination removes or at least covers them.That's magic.