Standard zoom for full-frame E-mount mirrorless cameras 42-105mm equivalent focal length when used on an APS-C camera Constant f/2.8 maximum aperture for Low light use and depth-of-field control Two F Low Dispersion (FLD) and two Special Low Dispersion (SLD) elements reduce chromatic aberrations and color fringing Three aspherical elements control spherical aberrations and distortion Both Super Multi-Layer and Nano Porous coatings minimize lens flare and ghosting and produce contrast-rich and color-neutral imagery Integrated stepping motor and optimized AF algorithm provides quick and quiet autofocus 28mm minimum focus distance: 7.5", 1:3.3 magnification 70mm minimum focus distance: 15", 1:4.6 magnification Rounded nine-blade diaphragm for a pleasing bokeh quality Brass bayonet for mounting accuracy and rigidity Rubber sealing for dust- and splash-resistance