New Rokinon 14mm f/2.8 Series II Lens Weather Sealed Ultra Wide-angle For Canon EF-M (SE14-M). Canon EF-M-Mount Lens/APS-C Format. 22.4mm (35mm Equivalent). Aperture Range: f/2.8 to f/22. Three HR Elements, Two ED Elements. Aspherical & Hybrid Aspherical Elements. Manual Focus Design, Internal Focusing. 14mm (35mm Equivalent: 22.4mm). 11.02 / 28 cm. 14 Elements in 10 Groups. Dimensions (ø x L). 3.43 x 4.8 / 87 x 122 mm. 1.53 lb / 695 g.