Canon 2x (7-Element) Teleconverter for EF 400mm f/5.6L USM + Nwv Direct Microfiber Cleaning Cloth

A 2x (doubler) teleconverter built with 7 optical elements that doubles the focal length of compatible lenses — for example, converting a Canon EF 400mm f/5.6L USM into an effective 800mm. Designed to extend reach while preserving the high resolution delivered by the attached lens. Package includes the teleconverter and an Nwv Direct Microfiber Cleaning Cloth.