Olympus OM-D E-M1
The Olympus OM-D E-M1 Micro Four Thirds is Olympus' compact mirrorless interchangeable-lens camera introduced on September 10 , 2013 . 
<triplet> Olympus OM-D E-M1 <subj> Micro Four Thirds <obj> part of <subj> mirrorless interchangeable-lens camera <obj> instance of