Originally posted by stevebrot That is expected. The setup is just to allow you to see the preflash.
Now do it without the 2s delay and with the slave in S2 mode. The slave should fire with the main flash with the master, though only the master will do P-TTL.
Thanks ! That works. But I'm even more confused now.
I thought the point of S2 mode was so that the slave flash would only fire every other time - not for the pre-flash, but only for exposure flash, to save flash power.
Isn't it ? Maybe the 2 second delay is interfering with S2 mode on the slave flash.
I guess there is actually a pre-flash sent from the mounted P-TTL flash even when using normal drive mode, but it's invisible to me.
That would explain why the slave flash fires in S2 mode without the 2 second delay on the master flash, but won't fire with the delay.
I still can't detect any difference in the image whether the optical slave flash is in S1, S1 2nd curtain, S2 or S2 2nd curtain, when the main mounted flash is P-TTL.
The Shanny was mounted on my camera. I used 1/40 as the shutter speed. Slave flash was the TT350P set to 1/16 power.
Quote: You got me. You can try setting the TT350p for trailing curtain sync and make it a TTL slave of the X2T-P (K-1ii with shutter speed below 1/90s) and see if it works.
I assume you mean set up the TT350P as radio TTL slave. I did. Only front curtain or HSS options are available. This is true for both for the trigger and for the flash.
On the TT350P, rear curtain appears to be available only in optical slave mode, or when mounted on top of the camera (P-TTL).
---------- Post added 05-23-21 at 04:33 AM ----------
Looks like my Flashpoint Mini is in a hosed state. In TTL mode, it shows "TTL M 14mm zoom". It's stuck on 14mm regardless of the lens I have attached, and doesn't change when zooming in or out with a zoom lens. I can't find a factory reset procedure for this flash.
Firmware is at version 1.1 . There is apparently a version 1.2 available on the Godox site. Just not sure it is cross-compatible with the Flashpoint mini. And the firmware 1.2 version resolves a different problem related to wireless, anyway. With my Shanny mounted instead, the mm change on its display when zooming in or out. So I don't think it's the camera. Sigh.
Edit: looks like pulling out the diffuser forces the flash to 14mm. I hadn't pushed it back in all the way. Now it's back in auto mode. Still wish I could factory reset it, though.