Walimex pro RingFlash HS 400 - walimex-webshop.com
RINGFLASH LOMOGRAPHY
Strobist: Full Review: Ray Flash Ring Flash Adapter
Amazon.com : Godox ML150II Macro Ring Flash on Camera Ring Flash Light GN12 CCT 5800K±200K for Fuji, for Canon, for Nikon, for Sony, for Olympus Camera : Electronics