Olympus OM-D E-M1

The new flagship Micro Four Thirds camera also replaces the E-5 pro DSLR. At Olympus, it would seem the time of the internal mirror has ended.
The original Four Thirds System was introduced in 2003 based around a 17.3x13.0mm image sensor that was smaller than the 23.6x15.6mm APS-C sensors used in most DSLRs of the time.

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