Sigma 23mm f/1.4 DC DN | Contemporary - unknown Mount

The Sigma 23mm f/1.4 DC DN Contemporary is a fast prime lens designed for APS-C mirrorless systems, providing an equivalent focal length of approximately 35mm. It features a compact build with a large f/1.4 aperture, making it well-suited for low-light street photography, environmental portraits, and reportage. The optical construction includes SLD and aspherical elements to control aberrations and maintain sharpness across the frame. When inspecting a used example, check the rear mount and contacts for signs of wear. The autofocus motor should operate silently and swiftly; any grinding noises may indicate impact damage. SDS verifies the internal optics for dust ingress or haze and ensures the manual focus ring rotates smoothly without any grit or resistance. Check the filter thread for any warping that might prevent the attachment of accessories.