Compatible with Canon EOS EF (will not mount EF-S) lenses on Micro Four Thirds (MFT) mount mirrorless cameras; Infinity focus or beyond allowed Enhanced craftsmanship and high-tolerance construction for demanding professionals; Integrated aperture iris for incoming light adjustment Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter and no adjustments required Precision all-metal construction for secure and solid fit Limited 2-Year Manufacturer Warranty