The Samyang 85mm lens is made with mostly glass and aluminum components and the build quality is superb. Its focusing is silky smooth with an internal focusing (IF) mechanism so that the physical size remains constant during focusing.  There are little or no chromatic aberrations and Bokeh is just about perfect.  The lens comes complete with a removable lens hood, lens caps, lens pouch.  The lens is available in the following mounts:  Canon, Nikon with auto confirm chip, Pentax, Sony & Olympus 4/3.