Rokinon 650-1300-mm Super Telephoto Zoom Lens for Canon T1i, XSi, XS, XTi, XT, 50D, 40D, 30D, 20D, 10D, 7D & 5D Digital SLR Cameras Aperture range: F8-16 Optical Construction: 8 Elements in 1 Group Angle of View: 3.8-2.0; Minimum Focusing Distance: 4.95m (16.25ft) Filter Size: 95mm Focus Type: Manual; Mount: T-Mount Adapter (Included for Canon EOS)