Product Description Canon is a leader in professional business and consumer imaging equipment and information systems. Its extensive product line and digital solutions enable businesses and consumers worldwide to capture, store, and distribute information.This Dioptric Adjustment Lens requires Rubber Frame Ef, Eb or Ec. It is designed for all EOS cameras except EOS-3, A2/A2E, ELAN 7/7E, II/IIE, IX & IX Lite.