The Elinchrom RF3000 Ring Flash can be used with any Elinchrom power pack, and is capable of storing 3000 watt/seconds. It is primarily used for fashion photography as a shadowless, high-key light source. The Ring Flash offers a unique ring-shaped catchlight in a model"s eyes, and is also ideal for product and industrial photographers for its ease-of-use and even distribution of light. Its inner opening is 4 (200 mm) in diameter, which allows most small and medium format lenses to be used. This is a flash head only. It requires an Elinchrom power pack, such as the 3000 AS Digital (EL10253).