My Hensel kit seems to work fine with the A7R II.I mostly use the Porty 1200's. Very portable, 1200 Ws battery powered:http://hensel.eu/katalog/products/flash/generators/blitzgenerator-porty-l-1200.htmlI use it with their Strobe Wizard radio system:http://hensel.eu/katalog/strobe-wizard-plus-funksender.htmlWhich can also talk to their mains-powered heads etc.Cheers, Hywel
Apologies, I read the post not the title!Hywel
but then may be the OP did not actually have __TTL__ in mind, who knows
do some searching
Yongnuo doesn't have strobes anyway, only speedlights.
Yongnuo makes strobes too = http://www.hkyongnuo.com/e-detaily.php?ID=347