Make sure you have all your bases covered by keeping this compact 28-75mm f/2.8 SAM Lens from Sony with your full-frame A-mount camera. It delivers a wide-angle to short telephoto range that will satisfy many, as well as a constant f/2.8 aperture for consistent performance at all focal lengths. Ensuring top performance is the use of three extra-low dispersion elements and four aspherical elements, effectively combating and minimizing any aberrations.