Sigma 150-500mm f/5-6.3 AF APO DG OS HSM Telephoto Zoom Lens for Nikon Digital SLR Cameras - International Version (No Warranty) Nikon F Mount/FX Format Aperture Range: f/5 to 22 Three Special Low Dispersion Elements Super Multi-Layer Lens Coating Hyper Sonic Autofocus Motor Optical Image Stabilization Rear Focus System Filter Diameter: 86mm Detachable, Rotatable Tripod Collar Rounded 9-Blade Diaphragm