Olympus Zuiko EC-20 2x Teleconverter for Olympus Digital SLR Cameras 2x teleconverter for doubling focal length of Olympus Zuiko digital lenses Puts more subjects within photographer's range without affecting mobility Provides convenient, cost-effective solution to demands of telescoping shooting Fits any Zuiko digital interchangeable lens; dust- and drip-proof housing Measures 2.67 inches in diameter and 1.61 inches long; weighs 0.49 pounds