• 49 mm to 77 mm metal filter adapter ring. • Converts the lens thread to the thread size of any other accessory (filters, hoods, flashes, lenses). • Made of high-quality black anodized aluminum, corrosion-resistant. • Extremely stable and lightweight, designed for a secure and tight fit. • Outer thread on the lens side: 49 mm. • Inner thread on the filter side: 77 mm. • Compatible with Canon, Casio, Pentax, Olympus, Panasonic, Sony, Nikon, Ricoh, Sigma, Tamron, Samsung, Fujifilm, Agfa, Minolta, Kodak cameras. • An essential accessory to unlock the potential of your camera.