Homage to the legendary 50mm f/1.5 "S21" Closely follows the original element design and performance characteristics with improvements in contrast and line transfer. Six elements in a four-group design Support frame coverage up to 44x33mm on digital sensor, significant changes to the original design Minimum focus distance (MFD) of 0.7 meters Lightweight aluminum alloy body construction In-house manufactured, Lanthanide-infused elements specifically designed for the 50mm f/1.5 "Z21" This listing is Matte Black Paint verison,if you need the Glossy Black one, you can contact with us for the stock information. Each lens is handcrafted and assembled in limited quantities, with utmost quality control and tolerance.