Wide Angle Manual Focus Lens for Full Frame DSLRs The Samyang 20mm F1.8 ED AS UMC lens offers a wide angle manual focus specifically designed for DSLR cameras with full frame sensor sizes. Its light flow is ingeniously crafted, taking into account the unique distance from glass to sensor found in mirrorless cameras, resulting in optimal performance. The bright F1.8 aperture secures a fast shutter speed even under restricted lighting conditions to offer the best quality images. It will brighten up your everyday snapshots. Also it creates an outstanding out-of-focus look by highlighting the main object effectively. In between ultra-wide 16mm and wide-standard 24mm, 20mm lens is a perfect fit to explore wide angles not only for shooting indoor images such as concerts and interior photos but also street snaps. The 0.2m of minimum focusing adds versatility to the lens. Based on Samyang Optics' exceptional optical technology, Ultra Multi Coating and two aspherical lenses and three extra-low dispersion have been included among 13 glasses in 12 groups to minimise aberration and unnecessary light dispersion, delivering high resolution from the centre to the corners of the image.