A compact ultra-wide-angle zoom with a constant aperture of F2.8, the SIGMA 16-28mm F2.8 DG DN Contemporary full-frame lens combines outstanding image quality and a large constant aperture of F2.8 with a robust but lightweight construction. This opens up scope for L-mount and Sony E-mount photographers who expect professional results from a compact product. Thanks to excellently corrected field curvature, the 16-28mm F2.8 DG DN Contemporary images sharply all the way to the corners of the frame, which is crucial for many wide-angle applications. Five FLD lenses and four aspheres ensure optimal image quality with a minimum of aberrations. An internal zoom mechanism ensures that the length of the lens remains the same over the entire focal length range and that it is always well balanced in the hand. The fact that the center of gravity hardly shifts when zooming is also an advantage for mounting in a gimbal.A thread on the front simplifies the use of filters. The lens has a compact design. Weighing just 450g, it measures just 100.6mm, so you can carry it with you all the time in everyday photography. It appeals especially to landscape, wedding and travel photographers who need to carry their equipment around for hours on end. Lightweight, extremely powerful and yet versatile - the SIGMA 16-28mm F2.8 DG DN Contemporary lets photographers enjoy all the freedom of the ultra-wide-angle range without any worries.