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.
Did you switch on the HSS function on your 580EX?
Same thing for the 550EX.
You should see a HSS flash icon on the flash LCD display once it is turned on.
Check and see if this fixes the problem?
Auto-detect is the default setting. If you didn't manually choose the flash system / profile, remember to always power on device from top to bottom and that is:
The V6 II should detect both your Canon flashes as Canon and apply an AUTO flash profile.
See if this works.
The latest one is V1.1.006, I believe.
Make sure to use the same firmware version on all units. I just had a problem (with HSS triggering) running V1.1.006 on the transmitter but V1.1.005 on the receiver. After I updated the receiver as well, the problem went away. Can't say with 100% certainty that the different firmware versions were indeed causing the problem, but I definitely recommend using one of the later firmware versions.
N.B., if you are running an older firmware version, you won't see it displayed in the PREFERENCES menu. In this case, just keep holding down the A and D buttons (but no other buttons) when turning on the V6II to check the firmware version.
However, if you experience anything being worse after the upgrade to V1.1.006 it is very easy to downgrade to V1.1.005 again. Just check for the available firmware versions with the Firmware Updater and choose "V1.1.005" to downgrade to V1.1.005 again.
So the Pentax AF-540FGZ are working perfectly without any banding?
We will be getting our hands on a 645Z next week so we will find out soon. Please bear with us during this time.