Sigma 17mm F4 DG DN Single for Mirrorless Contemporary Style Lens, L-Mount, Focus, Wide-Angle, Full-Frame Cameras,

The lens uses two SLD glass elements and three aspherical lenses. By using an aspherical lens not only in the first element but also in the very rearmost element closest to the image sensor, various aberrations are effectively corrected while keeping the body size small. Another major feature of this lens is its short minimum focusing distance of 12cm. Because it can focus even at close distances, it is ideal for selfies that include the background, as well as close-up shots. It features a metal exterior, a common feature of the I series. The machined aluminum parts are not only beautiful, but also contribute to improving the quality of the product itself, with a solid sense of rigidity and high durability. L-mount 17mm F4 Single focus wide angle Mirrorless Full Frame