Hi, Ana!
Originally posted by bububob ... I got the cactus V6II and Godox V860II.
But I'm just not managing to setting it up!
My goals are to use it in HSS over 125 (mounted on camera on top of the cactus) and if that works, i will get a second cactus to be able to do the same thing off camera flash.
That won't work. To get HSS, you're going to need a flash that does Pentax's HSS, and Godox at this time only has one that does it (the TT350-P mini speedlight which is very small and low-powered). Also the Cactus triggers don't work directly with Godox gear and vice versa. With flash triggering, the transmitter and receiver both have to be in the same triggering system to work; 2.4GHz isn't enough to make two systems compatible (e.g., wi-fi and bluetooth are both on 2.4GHz).
Use of Cactus and Godox together to get HSS is a bit more complex than what you're envisioning.
Godox's flashes are capable of TTL/HSS if it's a matching "flavor" where the pins and electronic communication of the flash foot match that of the camera hotshoe. But the built-in radio slave is capable of switching and doing TTL across all the Godox supported brands (Canon, Nikon, Sony, Fuji, Olympus/Panasonic). And there's an interesting kind of loophole that if a non-Pentax Godox transmitter is stacked on top of a P-TTL/HSS compatible trigger (such as the Cactus V6II), then you can get HSS.
But right now, Godox is actually in the middle of rolling out Pentax support, so all the pieces aren't in place yet for TTL/HSS both on and off the hotshoe with Pentax gear. I'd recommend the three following scenarios as a way to get HSS with your camera:
- Return the V860II, and get a Cactus RF60x. The Cactus RF60x has a built-in V6II transceiver, and can do P-TTL/HSS as a slave to a V6II used as your on-camera transmitter. The catch here is that the RF60x is a single-pin flash, so will be manual-only on the hotshoe, and will only do TTL/HSS as an off-camera slave.
- Return the Cactus V6II, and get a Godox XPro-P transmitter. The non-Pentax V860II flashes cannot be used on-camera as a TTL/HSS light, but can switch between all the brands Godox supports to do TTL with a different-system transmitter. You will, however, also have to make sure the firmware on your V860II is up-to-date (the C.Fn menu will show the currently loaded firmware version). If you don't care about TTL or on-camera use, you may want to consider exchanging your V860II for the less-expensive V850II ($140) or TT600 ($65) (single-pin manual only, but does M power control and HSS as a radio slave).
- Return both the V860II and the Cactus V6II; get a Godox XPro-P, and wait for the V860II-P to be released. At this time, Godox has not yet announced (let alone released) a TT685-P or V860II-P (which if they do happen will have a Pentax foot and be useable in TTL/HSS on the camera hotshoe as well as off-camera radio slaves/masters), but they have released the TT350-P TTL/HSS mini speedlight, and firmware updates for P-TTL compatibility for the non-P V860II models, which is a good indication they eventually will. But it may take a few months. Godox are also rumored to have a Profoto A1-clone in the works. And Flashpoint has announced a more refined version of the Xpro transmitter (Flashpoint R2 Pro II)
If you want a more detailed explanation of the Godox system, see
Flash Havoc's overview.
Last edited by inkista; 10-31-2018 at 02:20 PM.