Ultra-wide 20 mm to mid-tele 70 mm zoom range, for a wide range of movie and still subjects.Less ThanBrGreater ThanWith an unprecedented ultra-wide 20 mm to mid-telephoto 70 mm zoom range, this versatile lens is an excellent choice for a wide range of movie and still subjects. The ultra-wide 20 mm end of the zoom range maintains a wide angle of view when shooting movies with a 16:9 or 2.35:1 aspect ratio that reduces field of view.Less ThanBrGreater ThanLess ThanBGreater ThanOutstanding G Lens image quality with corner-to corner high resolution at all focal lengthsLess ThanBrGreater ThanWith two AA (advanced aspherical) elements, one aspherical element, three ED (Extra-low Dispersion) glass elements, and one ED aspherical element, this state-of-the-art lens design corrects both chromatic and spherical aberration for high optical performance right out to the image edges, from ultra-wide 20 mm to 70 mm.Less ThanBRGreater ThanLess ThanBGreater ThanPeak AF performance with two XD Linear Motors for precise, fast, quiet focus driveTwo XD (extreme dynamic) Linear Motors achieve fast, quiet, smooth focus drive with up to 60% higher AF speed and up to two times better performance while tracking for reliable, precise tracking. Moving subjects are reliably tracked when shooting continuous stills at up to 30 fps, or up to 4K 120p with alpha compatible cameras.Less ThanBrGreater ThanLess ThanBrGreater ThanLess ThanBGreater ThanRefined movie imagery with minimized focus breathing and focu