Focal Plane/High Speed Sync is a creative tool that allows you more artistic control when there is the need for a faster shutter speed to freeze action and to control the ambient light. It allows you to use shutter speeds much faster than the camera’s native flash sync, typically 1/200th or 1/250th of a second. These faster shutter speeds are achieved when the rear curtain begins to close before the front curtain fully opens. In this process, the Raven sends signals to the flash units for several flash pules as only a small window of exposure moves across the image sensor. These flash pulses, which in total equal the flash units set power level, more than cover the length of the shutter speed. Since the camera’s sensor is not capturing the full amount of the strobe pulse, you will need to adjust your exposure by opening your aperture, and or, increasing your ISO when shooting in manual mode. These exposure adjustments may not be necessary when shooting in TTL mode. However, you will also be using up more battery power when using battery powered flashes and speedlights regardless of what exposure mode you are using.
*Focal Plane/High Speed Sync is available in all Profoto TTL flash units, most Godox flash units, the PocketWizard FlexTT5 and PowerMC2, and the Paul C Buff Link.
Setting up Focal Plane/High Speed Sync
Set up all your flash units needed for your photo shoot and select your flash brand and channel in the Raven. Then select the shutter speed you want to use for high speed sync. Now press the SyncView button on the right side of the Raven, then tap the FP icon. You can now take a picture and view the image. From here you can adjust your aperture and/or ISO for a correctly exposed image.