- Aperture: F6.3 Fixed
- Optical Construction: 7 Elements in 6 Groups
- Angle of View: 5 Degrees; Minimum Focusing Distance: 2.0m(6.1ft)
- Filter Size: 95mm
- Focus Type: Manual; Mount: T-Mount Adapter (Included for Pentax Mount)
Weighing just 25 oz., this 500mm mirror lens is ideal for nature, wildlife, and sports and photography. This features a faster F stop of F6.3. It also includes lens caps, lens case and a 1 year Rokinon warranty.