The FOC Series Fiber Optic Collimators are single element collimators. They incorporate female connector bushings including SMA, ST, and SC. This series of collimators are designed for use with 0.22NA fiber optic cables. There are 3 basic sizes differentiated by the maximum output aperture. Please note all of our products can be modified to meet your requirements. These collimators will reduce the divergence of 0.22NA fiber from approximately 12.7 degrees to approximately 0.3 degrees at the center wavelength.