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Message: <blockquote data-quote="daredevil123" data-source="post: 114588" data-attributes="member: 11958">Actually how D40 and D70 achieves the high sync speed is not in the mechanical shutter. They used an electronic shutter which in actual implementation, turn off and on the sensor. IIRC the mechanical shutter still syncs at 1/250s, but any faster, the sensor will turn on and off when the mechanical shutter is full open.Agree that radios do affect sync speed. The cheaper radio triggers tend to give you lower sync speed due to more latency.</blockquote>