Specifications Main Unit Spec Focal Length & Maximum Aperture 70-300mm f/4-5.6 Lens Construction 15 elements in 10 groups Diagonal Angle of View 34° - 8° 15' (with full-frame camera) Focus Adjustment Front-focusing method with helicoid ring drive Closest Focusing Distance 4.9 ft./1.5m Zoom System 6-group helical zoom (rotational angle: 84°) Filter Size 58mm Max. Diameter x Length, Weight 3.0 in. x 5.6 in., 22.2 oz. / 76.5mm x 142.8mm, 630g (lens only)