Opteka 800mm f/8 Telephoto Mirror Lens for Panasonic GH2, G2, GH1, G1, Olympus PEN E-PL1, E-P1, E-P2, and other Micro Four Thirds Digital Cameras

High definition multi-coated optics produce sharper, more intense picturesIncredibly compact and lightweight8 elements in 8 groupsAngle of view: 3 degrees; Min Focusing Distance: 3.5mFront filter size: 105mm; Rear: 30.5mm
Product DescriptionThe Opteka mirror lens is incredibly compact and lightweight. Using an advanced reflex design, this is a mirror lens that is ideally suited for wildlife and sports photography. It has a fixed aperture of f8. It comes complete with a soft pouch. Opteka

Source: Digital Camera and Video Store...