Nikon F Mount/DX Format 75-150mm (35mm Equivalent) Aperture Range: f/1.8 to f/16 One SLD and Three FLD Elements One High-Refractive Index Element Super Multi-Layer Coating Hyper Sonic AF Motor Internal Zoom and Focus; MF Override Rounded 9-Blade Polycarbonate Diaphragm Fixed, Rotating Tripod Collar