Fotodiox Pro Lens Mount Adapter - Konica Auto-Reflex (AR) 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 Built-in Multi-Coated Glasses with 1.4x focal correction; Removable for Macro Photography (Instruction Link in Description) 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