645Z and Canon 580ex HSS
I cannot get the HSS to work on the Canon 580ex.
I can get the power to vary up and down but not HSS.
I have tried the flash set to E-TTL and TTL.
On initial set up, I had the camera V6 TX set to camera system Pentax and flash system Canon...but that did not work. I had to set the V6 TX flash system to Pentax for the 580 to work.
Currently, I have the camera V6 TX set to Camera System Pentax and flash system Pentax. The V6 RX is set to flash system Canon with AUTO. Everything works fine up to max synch...anything higher, and I then get black lines at top of exposure. The flash is set to HSS as is the TX module.
Its the same with the 550ex as well. Although the band at top of exposure on the 550 stays minimal up to 1/4000. On the 580, the band gets worse as speed increases.
Also, the Pentax 540FGZ II works fine in all respects on the RX...power up/down and HS works fine.
With three Canon flashes, I really wanted this to work rather than buying more Pentax gear.