Cactus have released the Pentax version for their
"X-TTL" firmware variant.
If you own a V6II, just use the firmware updater (for
Windows or for
Mac) and look for a firmware version for Pentax with the letter "A" in it.
The new firmware unlocks P-TTL capabilities, including automated metering with HSS and second-curtain sync.
Sadly, the "X" in "X-TTL" is not really justified because one may only use Pentax-compatible flashes or RF60(x) flashes. In other words, there is no cross-brand compatibility with Canon, Nikon, etc. flashes. During beta testing, automated metering worked exceptionally well, though.
RF60(x) flashes require a firmware update to cooperate with the "X-TTL" firmware for the V6II but then support P-TTL.
The old "multi-brand" firmware is still available. You'll want it, if you want to use the same trigger on different camera systems or depend on controlling flashes for other flash systems (Canon, Nikon, etc.).
Last edited by Class A; 11-07-2017 at 05:37 AM.