Originally posted by stevebrot I discovered yesterday that the "FGZ-non II" manuals contain compatibility notes for other flash including the AF500FTZ. The user guides for those two flash are so very extensive. As for digital TTL on the 645n with the AF500FTZ, the 645n manual has a nice paragraph specific to that flash and the compatibility matrix lists full dedication and TTL support.
Steve
One reason I have so far bought five of them was not for an insane level of backup in case the one for the 645
N failed, but because they could be optically slaved to the primary flash itself and then be used as "wireless" room fill, background fill and even rim lights. But operated as slaves, they are effectively modest power studio lights emitting whatever level radiant intensity they are set to. TTL control over several would be nice.
And they are relatively inexpensive, as low as $50 plus shipping.
And they can be powered from Quantum Turbo Batteries (as can the -540s) and recharged in 2 seconds from full discharge, making (at least in theory because I haven't tested it yet) 645
N auto-bracketing feasible at reduced flash power.