The Rokinon 24mm F1.4 ED AS IF UMC Lens gives you a substantial wide angle of view of 84° with full-frame Canon cameras. It can also be used with Canon APS-C cameras to provide a 57.6° angle of view basically equivalent to a 35mm lens on a full frame camera. It works well for landscapes, interiors, street photography and astrophotography. It's 13 elements in 12 group design utilizes 4 Extra Low-Dispersion (ED) glass elements and 2 Aspherical elements to produce sharply defined images even in low lighting conditions. Focus can be as close as 9.84" for outstanding wide-angle close-up views. Anti-reflection UMC coating (Ultra Multi Coating) enhances light transmission, increases contrast and reduces flare. The non-rotating 77mm filter mount allows easy use of polarizers and other rotating filter types while the silky-smooth and perfectly-damped long throw action of the focusing ring provides precise focus control. Ideal for landscapes, interiors, street photography, low-light photography, and astrophotography Constructed with 2 Aspherical and 4 ED elements for outstanding, sharply defined images UMC coating reduces flare and ghosting while increasing contrast Non-rotating 77mm filter mount User Manual Download