Oh also the lens is not by Ziess rather from the Olympus Four Thirds Zuiko Digital Top Pro range but it used to hold the world record for resolution and the glass surfaces are supposed to be polished to the same accuracy as a human hair within a baseball stadium!
Could be why the Chromatic Aberration unlike any other telephoto is actually lowest when wide open at F2.0!!! Resolution peaks at F2.2! One of the finest optics ever made on the planet!
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