In busy situations with lots of people, a photojournalist can use flash to draw attention to a single, important subject, highlighting what is important without entirely removing context.
"Very often, numerous elements dominate and disturb a scene, making it difficult to accentuate a single subject," Fabio begins. "Using a flash enables me to 'clean' an image, giving importance only to what interests me. This is a good technique at any big event, especially when you have a crowd of people but only one subject, for example at a concert, a theatre or a conference."
By firing a flash directly at a single subject within a crowd, usually a bride or groom, Fabio isolates the subject from surrounding chaos. In situations of vibrant colour, he applies a coloured gel which contrasts with the dominant ambient tones, furthering the isolation. He prefers to position a single Canon Speedlite 600EX-RT remotely, roughly perpendicular to his subject, using a narrow zoom, around 70mm, to channel light accurately. "This allows for a three-dimensional effect, avoiding flattening the subject by using frontal flash," he says.
"The flash power must be enough to illuminate the subject and cancel out other external light," he adds. "I use manual flash, as TTL flash metering could be misled by other light sources."