This loupe connects to the LCD viewfinder of your GH3/GH4 (includes a tripod-threaded electronic camera base plate). It amplifies the LCD image enhancing manual focus accuracy in addition to obstructing sunshine reflection on the LCD, so you can see the details you need to see. The loupe area is hinged and can be raised as needed if you only desire to ride it as a sun shade. There are limitations to activity if you have an external mic or earphones attached. Here are links to appropriate reviews/forum discussions - kindly see them to see if this loupe will work for you.

　　Cheesycam testimonial:.

　　/watch?v=hU_nHD0OUrw.

　　Personal-view online forum discussion: (user asserts it works on his GH4).

　　-view.com/talks/discussion/6771/varavon-loupe-for-gh3/p1.