It is also sold under a number of different brands such as Walimex, Rokinon, Vivitar and Bower.

Introduced: 2013
Optical design: 14 elements in 10 groups
2 aspherical elements
1 ED glass element

Lens mount: Canon EF-M, Canon EF-S, Four Thirds, Fujifilm X, Micro Four Thirds, Nikon F (DX), Pentax KAF, Samsung NX, Sony/Minolta Alpha, Sony E (NEX)
Covers: APS-C (around 25.1×16.7mm)

More info: 

http://www.dpreview.com/products/samyang/lenses/samyang_10_2p8/specifications

Review: 

http://www.lenstip.com/407.1-Lens_review-Samyang_10_mm_f_2.8_ED_AS_NCS_CS_Introduction.html

http://www.ephotozine.com/article/samyang-10mm-f-2-8-ed-as-ncs-cs-lens-review-25473

http://www.thephoblographer.com/2014/04/20/review-rokinon-10mm-f2-8-pentax-k/#.VWrtr8_tlBc