Fotodiox Pro Lens Mount Adapter - M42 Type 2 (42mm x1 Screw Mount) to Sony Alpha E-Mount Mirrorless Camera Body Mounts M42 Screw Mount SLR Lenses to Sony E-mount mirrorless cameras; infinity focus or beyond allowed Enhanced craftsmanship and high-tolerance construction for demanding professionals Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter and no adjustments required Precision all-metal construction with chrome plated brass mounts for secure and solid fit 24-Month Fotodiox warranty