Fotodiox Pro Lens Mount Adapter - M42 Type 2 Screw Mount SLR Lens to Canon EOS (EF, EF-S) Mount SLR Camera Body, with Focus Confirmation Chip Premium Grade Fotodiox Pro Adapter with built-in Focusing Confirmation Chip Version 2 adapter suitable for all Lenses without aperture preview control Enhanced craftsmanship and high-tolerance construction for demanding professionals Precision all-metal construction with chrome plated brass mounts for secure and solid fit 24 Month Manufacturer Warranty