To sell a new line of lightweight DSLRs from Olympus, Boston ad boutique The Fantastical invented an affliction: DSL-Arm. This three-minute mockumentary makes the point unmistakably but gently, without coming across as a hard sell. ("He's not a monster," promises Paul's little daughter. "He's just a normal person.") The campaign, which also includes a :30 spot, was directed by the duo of Moorhead and Benson (Spring).