It seems to me that "all" flashguns will work fine with the D800 but not so with the D810. A perfect gun for me is a SB400 style ,light ,close to the lens to minimise shaddows and works on an extension cable. My other favourite because it does high speed sync is the Meike Mk 300/310/320..none of these will work with the 810. Then I look at the taller ones ..the Nissin i40 and i466....both will work with the 800 but require "the latest software" to work with the 810 ...flash gun software that is ...Have written to Nissin but no answer as yet. So has anyone used these guns ON A CABLE as some guns work in the shoe but not on a cable. Can you recomend a gun ? Big tall and heavy is not an option, Both my Yongnuo guns work fine but are too big. The SB 300 uses AAA and the SB500 has stupid complex on off switch and no high speed sync. JUST IN
Nissin say I have to send the i40 (if I buy and it does not work) to Nissin UK to be upgraded with special tools. well at least I got a reply.The latest stock comes direct from factory compatible.