Vivitar 500 mm f/8 Telephoto Fixed Lens for T-mount

High-reach Vivitar 500 mm f/8 telephoto fixed lens designed for T-mount systems. Compact in length at 11.75" yet offering a narrow 5 degrees angle of view, it keeps subjects at a distance with a minimum focus of 33ft. Optical construction consists of 4 groups / 4 elements with multicoated surfaces to help control reflections. Filter accessories attach via a 67mm thread.