The Nissin Di866 was launched as direct competition to the Canon 580 EX II and Nikon SB 900, albeit for a price of £190, over £100 less than its competitors. A quick check through the specifications makes the Di866 seem very tempting, with impressive features including a GN of 60 (ISO 100 at 105mm), 2 greater than either the Canon 580 EX II or Nikon SB 900, and compatibility with Canon's ETTL II or Nikon's iTTL systems, depending on fit.



Link: Techradar