Rokinon ED500M 500mm F/6.3 Mirror Lens

Aperture: Fixed F/6.37 Elements in 6 GroupsFilter Size: 95mmMinimum Focusing Distance: 6.1 ftIncludes lens caps, lens pouch, instruction manual, and 1 year Rokinon warranty
Product DescriptionThe Rokinon mirror lens attach to your camera with a standard t-mount adapter. T-mount adapters are available for all camera mounts. The Rokinon mirror lenses are highly powerful and are ideal for sports or nature photography. They are affordable, powerful and produce sharp & vivid images.

Source: Digital Camera and Video Store...