Originally posted by cloudbusting Hi photoptimist. Indeed I thought the similarities between the old and new systems were interesting enough to yield some possibilities but it seems tricky alright. I was thinking of a very roundabout solution that would probably be too impractical for serious use, however! -
If it was possible to trigger the camera shutter at a chosen time after triggering the flash (something like an intervalometer, but with the flash triggered first) , with a bit of experimentation, do you think a HSS flashgun could be used in this way? Even if such a thing could even be done, it would only be useful in studio in limited (desperate?!) circumstances - but it's just a thought!
There's two trigger hacks possible: 1) trigger the HSS flash gun and then trip the camera's shutter; 2) trip the camera's shutter and use a delay circuit on the FP flash sync port to trigger the HSS flash. Both can work with the best results coming from which ever has the most predictable/reliable timing. I'd think #1 would be hard because it relies on knowing the EXACT time delay between hitting the shutter button, the mirror lifting, and the first curtain starting to open. Variations in temperature, lubrication, and wear probably make the shutter-button-to-curtain-opening pretty unpredictable. In contrast, the FP sync-to-curtain opening should be more stable which makes option #2 more reliable. Option #2 has the advantage of being less obtrusive -- just a little box on the cord going to the FP flash sync port -- instead of some mechanical contraption mounted on top of the camera's shutter button.
In any case, pathdoc is right about a second layer of trickery being required. Modern-day HSS flashes need to be told by the camera exactly what to do. There's little strings of digital data, synchronization clocks, etc. going back and forth between the flash and camera. The two devices talk to each other about power settings, aperture, shutter speed, flash mode, flash readiness, triggers, etc. It's a little conversation between camera and flash and unless the camera says the right things, the flash won't do anything. Obviously the MX does not speak the language of any modern flash. But it's exactly the sort of thing a properly programmed Arduino microcontroller (and dedicated electronics/software hobbyist) can readily do and maybe someone out there on the internet has already done.