High-speed sync allows photographers to use a flash at high shutter speeds, perfect for outdoor portraits or any time you need flash and a fast shutter. Here’s everything you need to know.

Apple’s new iPhones contain a feature that’s flown under the radar, but could prove to be one of the biggest upgrades to the camera flash in years: slow sync. The iPhone 8, 8 Plus and X all ...

But Apple addressed this on the iPhone 8, 8 Plus and X with a feature called Slow Sync Flash. The name sounds technical, but it's a term borrowed from photography.

Among the diverse features loaded on this flash is TTL exposure control as standard as well as high-speed sync, rear-curtain sync and wireless flash functions. Meanwhile, the Autozoom function, bounce ...