New answers tagged speedlite
You can use higher shutter speeds than your sync speed, but it is not "true" HSS. PocketWizard calls this feature "Hypersync." In "true" HSS, with hotshoe flashes, the flash sets out a serious of pulses timed to go with the travel of the curtain slit across the sensor so the whole sensor is evenly illuminated by the flash. This is not what Hypersync ...
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