Real time eye AF for still + Animal Eye AF Real time tracking World fastest 0.02 Sec AF speed with 425 phase detection and contrast points 24.2MP, EXMOR CMOS sensor with outstanding light sensitivity Optimized movie performance with smooth, quiet operation Outstanding rendering and operability inherited from a lenses Accessories for creative shooting, Maximum Magnification ratio (x)- 0.078x A 16 mm focal length and F2.8 maximum aperture; Although it provides full APS-C sensor coverage, this lens is only 62 mm in diameter