User Manual

11
Introduction
Adjusting Settings
FP mode (high-speed  ash sync)
At high shutter speeds, the  rst and second curtains in the cam-
era’s focal-plane shutter pass over the sensor simultaneously with
a small time gap, exposing only a narrow slit, with the result that
the light from a normally-timed  ash reaches only a small section of
the sensor. Flash photography consequently requires slower shutter
speeds, severely limiting the range of speeds available. The EF-X500
supports FP (high-speed sync), in which the  ash  res continuously
while the  rst and second curtains travel across the sensor, allowing
the  ash to be used at any shutter speed.