This effect was achieved by using a delayed flash option in the camera. Generally called the slow sync flash. Well the camera shutter opens with a flash and subjects within the flash range are illuminated(In this case the boys). Once the flash is gone, the shutter stays open for some more time, to record the images out of flash range, generally the background. The time I took this photograph was the start of nautical twilight, with just enough light to create a dim image of the jumping boys,even after the flash had done its job(The ghosting of the subject occured because of this). Using the Slow sync flash option, at twilight with moving subjects can create pretty dramatic images.Photograph details:Aperture:F/2.7 , Shutter :1/4 sec, ISO 80 , Flash mode: Slow Sync. White balance : cloudy.
