Specifically for use with APS-C sized image sensors</br>Lens for Canon EF-M Mount Compact System Cameras</br>Prime wide-angle lens provides a 35mm-equivalent focal length of 18mm</br>Fast f/2.0 maximum aperture benefits working in low-light conditions.</br>Three extra-low dispersion elements and two aspherical elements reduce chromatic aberrations and distortions</br>Lens not Zoomable</br></br>Product Description</br></br>Made just for mirrorless mounts is the new Rokinon 12mm f/2.0 NCS CS lens. It is available in Canon EF-M, Fujifilm X, Samsung NX, Sony E and Micro Four Thirds mounts. Its 35mm focal length equivalency for MFT cameras is 24mm, for Canon M cameras it is 19.2mm, and for the other three mounts, 18mm. With an f/2.0 maximum aperture, it is particularly effective in low-light capture and can control shallow depth of field for precise subject focus with pleasing out-of-focus backgrounds. It offers a minimum focus distance of 7.9". The lens’s impressive optical construction consists of three Extra-low Dispersion elements, one aspherical, and one hybrid aspherical element. The nano-crystal coating is applied to the inner surface of the two front-most lens elements to minimize ghosting and flare and improve overall image clarity. The Rokinon 12mm accepts front filters and provides a 67mm diameter thread.</br><br/>http://www.amazon.com/gp/product/B00JD4TAEQ