3rd party EVF for Sigma Merrill
This was on photo rumors. its in Japanese. There appears to be an EVF available that pugs into the Sigma Merrill cameras and allows for an EVF mounted in the hot shoe.
the photorumor url is http://photorumors.com/2014/06/22/what-else-is-new-73/#more-58280
Xitec in Japanese: http://forum.xitek.comhe/thread-1308497-1-1-1.html