In 16, the OMD EM1 was superseded by the Olympus OMD EM1 Mark IIThe Mark II features a slightly higher resolution MP Live MOS sensor The Mark II also has substantially faster auto focus—according to the manufacturer, six times faster upon first focus acquisition than the original EM1First introduced in September 16, Olympus OMD EM1 Mark II is a 0MP Pro Mirrorless camera with a Four Thirds (174 x 13 mm ) sized CMOS sensor, builtin Image Stabilization, Fully articulated touch screen and Micro Four Thirds lens mount Olympus replaced the older Olympus EM1 with this model and later EM1 II was replaced with Olympus EM1 IIIWeathersealed body (splashproof, dustproof, freezeproof) 5axis inbody image stabilization; Olympus Om D E M1 Mark Ii Test Preview Hands On Olympus e-m1 mark iii review