Sigma Contemporary 28-70mm 2.8 DG DN für Sony E

The Sigma 28-70mm f2.8 DG DN Contemporary provides the allure of a bright, fixed aperture zoom at a more affordable price and lighter weight than traditional 24-70 2.8 models. Compared to Sigma’s own 24-70 2.8 DG DN Art, the 28-70 Contemporary sacrifices those 4mm at the wide-end to save roughly 20% in price and lose almost half the weight. If you’re satisfied by the 28-70 range in a general lens, the Sigma DG DN is sharp in the middle and only softens in the extreme corners with the aperture wide-open, where you’ll also notice darkening due to vignetting. Closing the aperture to f4 improves vignetting and sharpness, and by f8 the image becomes consistently bright and sharp across the frame. If you’re shooting closer subjects like portraits, the background rendering can be attractively smooth at f2.8, and while there’s textures within bokeh blobs, it’s no worse than most zooms with similar ranges. Meanwhile the build quality is fine, although it’s only dust and moisture-sealed at the mount. Ultimately the Sigma provides a compelling alternative to bigger, heavier and more expensive zooms while maintaining decent results, but compare closely to the similarly-specced Tamron 28-75mm f2.8.