Sunpak is one of the world's largest manufacturers of electronic flash equipment. It has earned a reputation for advanced technical achievement and superior quality. Sunpak electronic flashes are produced for professionals, advanced amateurs, enthusiasts, and casual photographers. They are designed to work with today's auto focus cameras having dedicated flash capabilities. All Sunpak flash units offer advanced features, which provide the widest range of creative control. They are supported by a wide range of system accessories.The shoe mount autofocus TTL dedicated 355F flash is equipped with a zoom head, and a bounce head. This flash is intended for Pentax cameras.