Nikon AF-S Nikkor 50mm f/1.8G Lens Fast, upgraded f/1.8, compact FX-format prime lens Focal Length-50 mm, Minimum Focus Distance-1.48 ft.(0.45 m) Newly developed optical system with Aspherical lens element, Exclusive Nikon Silent Wave Motor (SWM) M/A Focus Mode Switch,Filter Thread 58 mm, Autofocus: Yes. Dimensions (approx.) (from the camera lens mounting flange): Approximately 2.83 inches diameter x 2.01 inches Optimized for edge to edge sharpness on both FX and DX-format D-SLRs Lens not zoomable