This is a very nice, clean Five Star 500mm f8.0 Super Telephoto Lens With a 2x converter that makes this a 1000mm f16 Ultra Super Telephoto Lens. Uses a Preset Aperture. Has a rotating tripod collar mount to hold it steady on long shots. Optics are very nice and this lens works great at far distances. Utilizes a T mount system and I have included a Canon FD mount and both lens caps. You can buy a T mount for almost any brand of camera for around ,$10. Ships within 1 business day of sale. Thanks