I'm curious - what is a "centering defect" Photozone shows a flaw in the DA* 200 - purple fringing. Bad enough for me to avoid it. "Unfortunately the DA* 200mm f/2.8 has quite a problem regarding purple fringing. Purple fringing is a blooming effect that occurs at extreme contrast transitions. The camera sensor has surely a few stakes in here but the effect is also dependent on the lens. " . -- John Mustarde Paris, TX
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