Works seamlessly with 5100 - 7000 - 7100 - 7200 by keeping all the automation of sb 900 - (I compare with my hardware). Initially concerned with the price of my SB 900, I wanted during our trips to event-celebration, not expose my flash to the dangerous sign of a certain participant, so I searched a flash "at reasonable prices" and yes 345 it hurts my heart! And here's the 568 meet this test and I DO NOT REGRET IT. AND you have seen the price ... = 3 X 900 SB