Although it looks very similar to its previous PEN-series flagships externally, the Olympus PEN E-P3 includes several significant changes. Key among these is a new brand-new autofocus system, branded 'Frequency Acceleration Sensor Technology', or FAST for short. Olympus showed supreme confidence in choosing the name, and it wasn't misplaced: the E-P3's AF performance actually rivals that of many SLRs. The P3 also includes a new touchscreen interface, and a built-in popup flash that addresses one of the main concerns with its predecessor. Tweaks in its imaging pipeline are more subtle,...
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