The OTUS and the SX ASPH at f/1.4 visibly vignet at the corners, a common way of reducing aberrations at the edge of the image. The OTUS wide open and even stopped down to f/5.6 shows a better edge performance, visible at a higher definition (contrast and resolution combined) of the fine textural details of bricks. Based purely on measurable and objective facts the OTUS finishes indeed by a hair('s) breadth as first at the finish line. It is justified in this case, because adjacent topics are the more interesting ones. To start a report with the most important conclusion is perhaps not the usual thing to do. The comparison between Zeiss OTUS 55 and Leica SX 50 is extremely interesting because of the many themes that are addressed.
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