Rokinon 50mm T1.5 Full Frame Cine DS Lens for MFT CamerasThe 50mm T1. 5 AS UMC Cine DS Lens for MFT Camera from Rokinon is a fast manual focus prime lens. It provides a very fast maximum aperture of T1. 5 for effective low light capture and shallow depth of field control and an 8 blade iris for attractive bokeh. Optimized for cinema and video applications, the focus and aperture control rings are outfitted with industry standard gearing, which provides an interface for working with a traditional follow