FX-format ultra-fast classic portrait lens with high picture quality, high performance, beautiful Bokeh (background blur) and outstanding reliabilityUltra-fast classic portrait lens High performance FX-format f/1.4 medium-telephoto lens is perfect for portraits,low-light applications offering beautiful Bokeh (background blur) and outstanding picture quality.Nano Crystal Coat Use of Nano Crystal Coat further reduces ghosting and interior flare across a wide range of wavelengths for even greater image clarity.Optimized for edge to edge sharpness on both FX and DX-format D-SLRs DX-format D-SLR the angle of view is equivalent to a focal length of 127.5mm in FX/35mm formatM/A Focus Mode Switch Enables quick changes between manual and autofocus operation.Internal Focus (IF) Provides fast and quiet autofocus without changing the length of the lens, retaining working distance throughout the focus range.Exclusive Nikon Silent Wave Motor (SWM) Enables fast, accurate and quiet autofocus.Nikon Super Integrated Coating (SIC) Enhances light transmission efficiency and offers superior color consistency and reduced flareRounded 9-Blade Diaphragm Renders a more natural appearance to out-of-focus image elements.Specifications:Mount TypeNikon F-BayonetF stop range1.4-16Maximum Angle of View (DX-format)18°50''Maximum Angle of View (FX-format)28°30'Maximum Reproduction Ratio0.12xConstruction9 Groups / 10 ElementsCompatible Format(s)FX - DX - FX in DX Crop Mode - 35mm FilmDiaphragm Blades9Distance InformationYesNano Crystal CoatYesSuper Integrated CoatingYesAutofocusYesAF-S (Silent Wave Motor)YesInternal FocusingYesClosest Focusing Distance3 ft. (0.85m)Filter Size77mmDimensions Diameter x Length)Approx: 3.4x3.3 in. / 86.2x84mmWeight(Approx.)23.3 oz. (660g)Lens CaseCL-1118Lens HoodHB-55