Sigma 17mm f/4 DG DN | Contemporary - unknown Mount

The Sigma 17mm f/4 DG DN Contemporary is an ultra-wide-angle prime lens designed for full-frame mirrorless systems. Part of the I-series, it features an all-metal construction and a remarkably compact physical profile. With a minimum focusing distance of just 12cm, it is highly effective for close-up wide-angle photography and vlogging where a broad field of view is required in a portable setup. Check the aperture ring and focus ring for a smooth, tactile response without play. The magnetic lens cap, if included, should seat firmly. SDS checks the glass for scratches or coating wear, particularly on the bulbous front element. Ensure the mount is secure and the electronics communicate correctly with the camera body. As a modern mirrorless lens, firmware should be checked for compatibility with the latest camera features.