The L-3 Brashear SR-Series Catadioptric objective lenses are available in focal lengths of 50, 100, and 150 inches. The lenses, when mounted on the Kineto tracking mount, are an ideal complement to the sensor suite, producing high quality imagery to either a 70 mm high-speed film camera or a shuttered video camera.

The Brashear SR-Series Catadioptric Lenses are athermalized with Zerodur primary and secondary mirrors and a zero expansion metering structure. The lens designs allow focusing from 500 yards to infinity, while maintaining boresight to within 20 arc-seconds. The optional lens Focus Control Module allows full remote control of the lens focusing.

Each SR-Series lens can be mounted directly on the camera/lens platforms of the L-3 Brashear Kineto System, as well as on the Photo-Sonics Cine-Sextants, using adapter plates.