The Leica SL3 is the third in the series of mirrorless models, which started with the magnificently minimalist 24 MP Leica SL. I take a look at what’s changed and why you should buy it. What is it? The SL3 is the latest in the series and adopts the same body style as the 47 MP Leica SL2 and the 5-axis IS from that model, which was missing from the original SL. The headline specs are the increase in sensor resolution to 60 MP and the inclusion of hybrid AF with Depth from Defocus (DFD) tech to aid focusing accuracy. Fortunately, the photographer doesn’t need to know how this works,…