Tamron AFF017N700 SP 90mm F/2.8 Di VC USD 1:1 Macro for Nikon Cameras (Black) Moisture-Proof and Dust-Resistant Construction Durable Fluorine Coating on the front element repels water and fingerprints Advanced coating technology reduces flare and ghosting ; Camera Mount Type Nikon F Circular aperture to achieve beautiful, rounded blur effects bokeh ; Format Compatibility Nikon FX/35mm Film, Nikon DX VC enhanced with shift compensation ; Focal Length 90mm ; Aperture Maximum: f/2.8, Minimum: f/32