Sigma 17mm F4 DG DN Contemporary Lens Review

[SECTION]INTRODUCTION[/SECTION]One of Sigma's Premium compact prime I series lenses, the new 17mm f/4 shares the Contemporary concept of compact, light and affordable lenses. In many respects, it also seems to aspire to the high standards of the Art range, with its all-metal construction and pursuit of the highest possible optical quality. It is a full frame design, intended from the start for use on mirrorless cameras and available in L and FE mount. The designers claim to have gone one step be