Multiplies focal length by 1.7x Compatible with VR technology Please check compatibility prior to purchasing; Nikon Compatibility List The Nikon F mount was first introduced in 1959, and has since been adapted for the Nikon autofocus system culminating in the current generation of DX lenses, for APS-C DSLRs, and FX lenses, for full frame DSLRs. Wide angle, telephoto and zoom lenses are available for both sensor sizes, featuring movement-detecting Vibration Reduction technology and Extra-low dispersion (ED) glass to keep chromatic aberrations to a minimum. AF-S lenses add a Silent Wave Motor (SWM), which keeps the autofocus quick and quiet, with Internal Focusing (IF) keeping any attached filters static and, in the more advanced lenses, Nano Crystal Coat virtually eliminating ghosting and flare.