Move over PocketWizard, YongNuo are set to bring adjustable SuperSync timing to the masses.
Russian blog YN622.RU first picked this up, and I have now confirmed it with YongNuo. The coming YN-622-TX for Canon and Nikon, will have a manual timing adjustment added to the current SuperSync feature.
SuperSync (SS) allows high camera shutter speeds up to 1/8000th to be used with suitable manual studio lights. And the added timing adjustment greatly increases the usefulness of this feature by allowing the best results possible to be tuned in.
This can mean a cleaner frame, with less, or no shutter showing in the image. Or simply more light available in the frame (sometime up to a stop or more extra) than the standard timing.
SuperSync relies on flash units with long flash durations, so results will depend on the lights used, as well as the camera used. Full frame cameras with large sensors and slow shutters like the Canon 5D series are unfortunately the hardest to get good results with, though lights with long enough flash durations can still achieve clean frames all the way to 1/8000th.
A flash pulse from a studio strobe may look very fast, but its actually often a relatively long process, consisting of a bright initial burst, followed by a long slow exponential decline (or long tail of light).
SuperSync then use an early Pre-Sync signal to fire the flash just before the first shutter starts opening. So the peak of the flash pulse goes off just before the shutter starts opening. The long tail of light then lights the rest of the frame as the shutter slit moves across.
You can see a full explanation of the long duration sync method in the post here, detailing the Phottix Odin ODS, which is a similar timing adjustment also recently added to the Odin TTL triggers.
The SuperSync timing adjustment is also great news for owners of the popular new Cheetah and Godox AD180 and AD360 bare bulb flashes which have a unique HSS (High Speed Sync) feature.
Particularly for Nikon owners, as Godox does not currently have a transmitter available to enable the HSS mode with Nikon cameras as yet. But even with Canon, the timing adjustment can provide around a stop more light in the frame than using the standard YN-622C.
More detail on the coming YongNuoYN-622-TX transmitter can be seen here.