Calumet 6" (15cm) Wide Angle Umbrella Reflector 120 Degree with Umbrella Bracket and Silver Interior (Black Use the Calumet 6" (15cm) Reflector as a direct-light reflector or an umbrella reflector with flash heads that do NOT have a built-in umbrella holder. Calumet light control reflectors feature bayonet-type mounts for quick, positive mounting and removal on Calumet's Series-2 and Traveller Flash Heads. These innovative accessories offer studio and location photographers alike a comprehensive system of tools to handle any lighting situation they are likely to encounter.