Feel the wide angle universe in mirrorless camera uncoupled aperture ring and focus ring ed nano coating system ncs low dispersion lens ed hybrid glass aspherical lens h asp circular aperture with 6 blades samyang 12mm t22 cine ncs cs lens is a wide angle mirrorless video lens designed for aps c crop sensors t number representing actual amount of light transmission is marked on the lens to assist much accurate shooting distinguishing focus ring gear is suitabl