The 5724-C-H Aspheric Objective Lens is made with D-ZK3. It is 9.9 mm diameter, with 20x magnification and has focal length of 8.0 mm. This aspheric lens has a housing length of 8.8 mm with 8.0 mm clear aperture and a working distance of 5.9 mm. It is AR coated for the wavelength range of 1050 to 1600 nm. This compact glass plano-convex aspheric lens is a convenient, high-quality alternative to microscope objectives. It is especially handy for low f-number applications like coupling light into and out of optical fibers or collimating diode lasers since the aspheric surface minimizes the aberrations.