Includes lens, front and rear caps and pouch. Key Features 20mm EF F1.4 EF Mount Lens/Full-Frame Format Aperture Range: f/1.4 to f/16 Two FLD Elements and Five SLD Elements Two Aspherical Elements Truly wide and truly fast, the Canon EF mount 20mm f/1.4 DG HSM Lens is a member of the venerable Art series of Global Vision lenses from Sigma and pairs a sophisticated optical design with a robust physical construction.