The Olympus OM-D E-M1 Mark II was introduced 3 years after its official predecessor, the regular E-M1.

The E-M1 lacks the High Resolution mode, and also the 4K movie recording feature, which the Mark II has.

According to Olympus, the Mark II's autofocus is six times faster and also more accurate than its predecessor's.

The older model only has one memory card slot, the Mark II has two, and it supports UHS-II also, unlike the E-M1.

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