High-speed sync
From The Glossary of Digital Photography
Since the typical flash synchronization speed in cameras with focal plane shutters is around 1/60th of a second, anything higher is often considered high speed. Leaf shutters commonly sync flashes at any speed they offer (usually up to 1/500th of a second). Modern digital cameras using the latest digital flash units can often sync their shutters up to 1/90th or 1/125th of a second. This speed varies by individual camera and flash combination. See also flash synchronization
