Originally posted by mcgregni I think you need to assess this by photographing a scene actually lit by the Shanny flash, not a photo of the Shanny flash lit by a Pentax flash on the camera.
Also I think the triggering flash should be in "control" mode to remove its effect from the scene, so that you are seeing only the results of the Shanny's output during the exposure time.
In the test published in my previous message I think that there was something missing, perhaps more curious than important:
Settings:
Camera: ISO 200, F5.6, 1/160, "wireless control" flash of the camera activated.
I shot by getting a picture almost black (photo 1).
I add Shanny slave flash in S1 Manual mode, 1/64 power, HSS disabled.
I shot by getting an illuminated photo (photo 2).
Active HSS in the Shanny.
I shot by getting an illuminated picture (photo 3) but with less intensity than photo 2.
It is this lightening difference that shows that Shanny acts differently when the HSS is activated. In this test I used a shutter speed within the normal synchronization margin, but in the previous test I used high synchronization speed.
---------- Post added 10-02-18 at 10:24 AM ----------
Originally posted by mcgregni
It would be good to test whether an on camera triggering flash can be used in ‘control’ mode for this, removing the need to use minus compensations and turning the head away....ideally we want to aim the control flash head straight at the slaves optical sensor, and this is very important outdoors in bright sun. I am aware that some Metz flashes don’t provide the option of ‘wireless control plus HSS’ mode together (as the Pentax units do). We might assume that control mode triggering would also work, however there are some differences in the pre flash sequence in that mode which would need testing with the Shanny S2 mode to be sure.
I can not do this test!
Metz 52 AF-1, placed on the camera's warm shoe, has the option to work as a remote controller (without affecting the exposure) ... but it does not allow shutter speed superior to the Normal synchronization (HSS is not possible).
In any case, I think that a flash installed on the camera's hot shoe, in remote control mode and activated HSS, would fire the Shanny correctly, in slave mode S1 or S2. I can not say it but I do not know why I should not do it.
---------- Post added 10-02-18 at 10:37 AM ----------
Originally posted by mcgregni
It would be good to test whether an on camera triggering flash can be used in ‘control’ mode for this, removing the need to use minus compensations and turning the head away....ideally we want to aim the control flash head straight at the slaves optical sensor, and this is very important outdoors in bright sun. I am aware that some Metz flashes don’t provide the option of ‘wireless control plus HSS’ mode together (as the Pentax units do). We might assume that control mode triggering would also work, however there are some differences in the pre flash sequence in that mode which would need testing with the Shanny S2 mode to be sure.
If I have a new chance to test with the Pentax AF540FGZ flash, I will try to do this.