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Olympus OM-D E-M5 Digital Camera Review$1,099.00
The Olympus E-M5's 12-50mm EZ kit lens suffered from some basic lateral chromatic aberration in our testing, though only near the edges of the frame and mostly just at the widest angle. By stopping down the aperture or zooming in to a longer focal length, the color fringing dissipated. We mostly saw CA in the form of blue and red fringing near the edges of our chart's slanted edge targets, with the harshest results at the lens' wide focal length and maximum aperture of f/3.5.
Distortion on the E-M5 was practically non-existent through most of the zoom range with the camera's in-camera distortion correction. This won't necessarily be applied if you're shooting in RAW, though the E-M5 does not have the option to turn off such correction for JPEGs. As we've seen on other Olympus bodies, shooting in RAW or attaching this lens to a Panasonic Micro Four Thirds body will yield worse results. With correction applied we did still see small bits of distortion, with the worst being 0.97% at the wide angle of 12mm. By the midpoint focal length of approximately 31mm this was already gone.