The L-10X Infinity Corrected Objective Lens is designed with the rear conjugate at infinity and is ideal for use as an input lens in collimating applications when optimum wavefront quality is required. The L-10X is a 10X objective with a 0.25 numeric aperture, a 9.0 mm clear aperture and a focal length of 18.2 mm. It uses a standard RMS thread, 0.800-36.