Here I show how to simply setup your Olympus Pen-F for off camera flash. You have to go full manual, but it’s really easy. Using the bundled FL-LM3 flash that came with the Pen-F together with:
Nikon SB-26
https://goo.gl/J91zP5
Tony & Chelsea Flash tutorial
Jason Lanier Channel
https://www.youtube.com/channel/UCDy1DrgRSUN1C29fmBLJj5g