will be able to use Canon, Olympus and other TTL flash units to work in either on-camera TTL or via radio remote TTL mode on various camera models, initially, Sigma, Sony and Fujifilm cameras, and then Micro Four Thirds Panasonic and Olympus cameras as well as Canon, Nikon, and Pentax cameras.
they will also allow remote control of power output and automatic zoom as well as Super FP/HSS mode, low output option (less than 1/128th to allow for ultra brief exposures) and Power Sync (presumably, similar to HyperSync)
two new types of unique TTL flash exposure Locks:
store a desired flash exposure that will automatically adjust according to changes in camera settings. Gone is the ever-changing flash exposures between each TTL metering.
Flash Power Lock
lock flash power output after a desired TTL exposure is achieved. Perfect for consistency in repeat shooting. Wireless TTL functions
the only flashes you can use for cross-TTL are Canon, Nikon, Olympus and Panasonic system flashes and not all flashes are compatible but you may be able to create a custom profile for your flash via your computer (can store up to 10 custom flash profiles)
there is a different version for Sony Cameras and Sony mount flashes but you can use your Canon or Olympus flash on a standard version and triggered by a Sony a7 with a Sony version trigger.
After setting the V6 II to auto-detect (AUTO) from a manually selection camera system, you must restart the V6 II for the selection to take effect.
HSS mode may not work on Pentax or Sony cameras unless you use brand-specific flashes - this is due to timing differences
HSS only works to 1/4000th sec on Panasonic GX85 cameras due to timing differences
you need to remove the hotshoe spring plate on some Olympus E-M1 cameras to ensure good contact, and then you must mount the v6ii and with camera turned on, must press the shutter halfway before turning it on into tx mode . How to make the E-M1 compatible with a Cactus V6 II
the locking pin is optimised for Canikon so the locking pin may not lock on Olympus cameras or Olympus flashes (can try pulling the flash back 0.5mm)
in 2017, Godox added units compatible with Micro Four Thirds system:
wireless transmitters on Micro Four Thirds cameras:
Godox X1T-O wireless flash trigger due August 2017 $US46
Godox TT350-O / Flashpoint Zoom Mini R2 TTL
similar to an Olympus FL36R but with Godox X1 radio system; GN36m; simple control for 3 remote slave groups, 16 channels, with a radio range of approximately 30 meters
S1 and S2 optic slave modes
wireless enabled receiver units:
Godox AD200 pocket off camera flash
Godox AD600B portable studio flash
Godox AD 360II off camera flash
Godox TTL speedlights (V860II and TT685)
Any of the brand-specific Godox lights designed for Canon, Nikon, and Sony all (such as the V860II-N, AD360II-C, and TT685S) can now function as TTL/HSS lights regardless of the brand triggering them so long as the master signal matches up with the camera brand.