... based on my recent experience. I'm also waiting impatiently for some Godox TTL speedlites with Sony multi-function hotshoe and TTL capabilities. They are part of the quickly evolving X system that Godox introduced recently. First general information about evolving TTL options for Sony Second using FEL to lock in TTL metering for multiple shutter clicks Third using the different metering area options for TTL metering And finally, HERE is an article describing how masking can be accomplished with the UNIT/ALT feature incorporated into the Godox AD600. This is not unique to Sony but a cool capability. I am lobbying Godox to make some version of the sequential firing that UNIT/ALT enables available on the X system lighting equipment ranging from the new version speedlites up to the already enabled AD600.