The Bower 3x Telephoto 37mm Conversion Lens for DSLRs is a high-quality Japanese-made lens designed for high-speed macro and telephoto still photography and videography. Its impressive high-power 3x magnification triples the focal length of your fixed and zoom lenses, while retaining full image resolution. Its multi-coated construction delivers high image clarity that minimizes light loss, particularly in low-light settings. It is designed to work in digital autofocus as well as analog modes and will work seamlessly with DSLR and camcorders by Canon, Nikon, Sony, Pentax, Olympus, Panasonic, Samsung, JVC and more. Includes front and rear lens caps and lens pouch for protective, lightweight transport. Filter thread size is 62mm.