Profoto update unlocks Sony a9 III global shutter flash sync

Profoto finally turned Sony’s a9 III global shutter from a spec-sheet flex into something you could actually build a job around. With the latest support update, eight Profoto lights now sync with the camera at shutter speeds all the way to 1/80,000 second, which means the a9 III can be used with flash without falling back on the usual high-speed sync compromises.

That matters because the a9 III was never a normal mirrorless body to begin with. Sony launched it on November 7, 2023 as the world’s first full-frame camera with a global shutter image sensor, pairing a 24.6-megapixel sensor with blackout-free 120 fps continuous shooting and a maximum shutter speed of 1/80,000 second. On paper, that is wild. In practice, flash photographers still needed the rest of the system to catch up. Profoto’s update does that by expanding compatibility to the A10, A2, B20, B30, D30, Pro-B3, Pro-D3 and Pro-11, giving shooters everything from compact on-camera units to larger studio heads.

The workflow change is the real story here. Before this update, photographers leaning on conventional high-speed sync often gave up flash power just to stay in sync at fast shutter speeds. Now Profoto says the a9 III can get full-power flash at any shutter speed up to 1/80,000 second, which is a much cleaner way to shape bright ambient light, freeze motion and keep the background under control. That is the kind of difference sports shooters, dance photographers, event photographers and fast-paced portrait shooters will feel immediately, especially when they are trying to stop action without dragging the shutter into mush.

There are still a few setup details to know. Profoto says the compatible flashes need to be manually set to FREEZE mode, and global shutter TTL works only when the flash is triggered by a Connect Pro for Sony running firmware B3 or later, or by an A10 for Sony running firmware C6 or later. Profoto also said the global shutter support is only for the Sony a9 III; on other Sony bodies, the setting behaves like standard first-curtain or hi-sync behavior.

This rollout also shows how far the system has come in a little over a year. Profoto’s May 19, 2025 announcement covered only the A10, plus the A10 used with the D30, Pro-D3 or Pro-B3, and called that first phase of a broader expansion. By June 2026, the list had grown to eight lights, which is the difference between a promising demo and a usable lighting ecosystem. Sony ambassador Brendan De Clercq worked with Sony and Profoto on a video showing why that matters, and the message is straightforward: the a9 III’s global shutter is no longer just impressive technology. It is now a flash workflow that can actually hold up on set, on the sideline and on the dance floor.