The Olympus OM-D E-M10 Mark IV is an entry-level camera that wears the hand-me-downs of its bigger siblings. The $800 camera and lens kit — $700 for just the body — borrows the eye detection algorithms of the E-M1 Mark III and a truncated five-axis image stabilization system, all paired with a sensor that’s only 0. 1 megapixels shy of cameras that cost more than twice as much.
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