Fujifilm Off-Camera Flash - How I Do It - Beginner's Guide - YouTube
Accidental Off-Camera Flash - Tangents
Amazon.com : Godox 12W Macro Flash MF12,2.4G Wireless Control,TTL/M Mode,Built-in 3.7V/6.29W Lithium Battery As an Off-Camera TTL Flash,Compatible with Such As Nikon, Sony, Canon, Fuji, Olympus and Panasonic. : Electronics