Originally posted by Bber hello, I would like to know if the Godox Xpro P TTL is compatible with the Pentax AF-360 FGZ flash and if so that it is the procedure to follow to synchronize the K1 between these
2 elements
Unfortunately, Godox sucks at integrating legacy OEM flashes into their lighting system. The Cactus V6II triggers are better for that.
Your Pentax speedlight is not directly compatible without additional gear, and with a Godox X1R receiver attached to its foot, all you can do is fire the AF-360 FGZ in sync off-camera. There is no P-TTL capable X1R receiver (it only comes in Canon, Nikon, and Sony flavors).
At this time, there are only two P-TTL capable speedlights in Godox's lineup: the V1-P round-head speedlight ($260) and the TT350-P mini speedlight ($85). Godox has never released a V350-P, TT685-P, or V860II-P. So you only have the top and bottom-tier options.
However. The Xpro-P is compatible with the single-pin manual Godox speedlights: the
TT600 ($60) and the V850II ($140). While these flashes cannot do TTL, and can only be fired when used on-camera; as off-camera radio slaves to an XPro-P, you would have remote group and power control, and HSS. No remote zoom/wakeup control, no firmware upgrade capability, no remote TTL control. But. A $60 pricetag can go a long way to making that more acceptable in an off-camera speedlight.
Given than an X1R receiver is already $40, throwing in an extra twenty to get a speedlight with a built-in radio trigger you won't forget to pack or forget additional batteries for may be worth contemplating.
If you really are jonesing for TTL in an off-camera speedlight for use with the XPro-P's TCM function, your cheapest option, aside from the TT350-P mini speedlight ($85), is to get a Godox TT685-C ($110, the Canon version) and upgrade its firmware so it can grok P-TTL signals as an off-camera radio slave. This can also be done with all the flavors of V860II ($180). But none of these will be TTL/HSS on a Pentax hotshoe, since the pin arrangement on the feet of the flashes won't match.
Godox tends to make most of its speedlights in two versions: "TT" AA-powered and "V" li-on battery pack powered. The li-on pack has roughly 3x the capactiy of a set of AAs, and can drastically simplify battery handling for high-volume shooting (say, all day events like weddings). So, the TT600/V850II, the TT350/V350, and TT685/V860II pairs of models are functionally identical, with the only difference being the power source, and (with the full-sized speedlights) the presence/absence of an external battery pack port.