This compact full-frame Carl Zeiss wide-angle zoom lens covers a 16mm to 35mm range with a constant maximum aperture of F4, enabling consistent depth of filed and exposure settings at any focal length. The high-performance optical design boasts ZEISS T* (T-star) coating for superior contrast and resolution, five aspherical elements including a large diameter AA (advanced aspherical) element with outstanding surface precision for low distortion and corner to corner sharpness – even at wide-angles, plus three ED (Extra-low Dispersion) glass elements to reduce chromatic aberration to an absolute minimum. The SEL1635Z employs Optical SteadyShot® image stabilization, Silent AF and iris (aperture) drive ideal for movie capture and a 7-blade circular aperture for beautiful defocussed backgrounds. Ideal for Full-Frame and APS-C E-mount cameras.