The 12mm, the Architectural & Landscape Photographer's Delight.
Pro grade super high performance wide-angle prime with a no-compromise optical design. It's super-bright aperture allows for more light to be captured even in lower light environments. Dual Super Aspherical (DSA), Extra-Low Dispersion (ED), and Super High Refractive index (Super HR) glass elements ensure that clarity is maintained at all apertures. Engraved depth of field scale with quick-clutch manual focus mechanism for hyperfocal photography All metal barrel and focusing ring MSC (Movie & Still Compatible) mechanism for fast and quiet autofocusing.