If you're seeking a compact, high-performance lens for your full-frame mirrorless system, the Sigma 17mm F4 Dg Dn Contemporary Lens is a perfect choice. This ultra-wide-angle lens, part of Sigma's esteemed Contemporary line, is designed to deliver superior optical performance in a compact, lightweight package. Weighing a mere 220g and measuring just 48.8mm in length, this lens is the epitome of portability without compromising on quality. It's ideal for landscape photographers, vloggers, hikers, and anyone who appreciates the unique perspective that a wide-angle lens can provide. The Sigma 17mm F4 Dg Dn Contemporary Lens is crafted with an innovative optical design, specifically tailored for mirrorless camera systems. This design helps minimize lens flare and ghosting, resulting in exceptional image rendering. The lens construction includes two Sld glass elements and three aspherical lens elements, which not only keep the lens compact but also aid in correcting lens aberrations.