The Samyang 10mm f/2.8 ED AS UMC CS is an ultra wide-angle prime lens designed for use with cameras that have APS-C / DX sensors. It will be manual focus only and gives an equivalent focal length of 15mm (or 16mm in the case of Canon EOS) in 35mm terms. A prototype of the Samyang 10mm f/2.8 ED AS UMC CS lens will be showcased at Photokina and it will be available at the end of 2012.