The Brightin Star 55mm f/1.8 is available at Amazon now and is an affordable fast 50mm available for multiple mounts. Additional information: Brightin star 55mm f/1.8 fixed lens Focal length: 55mm Lens length: 60mm Maximum aperture: f/1.8 Minimum aperture: f/16 Optical construction: 7 elements in 5 groups Angle of View: 37º Aperture blades: 12 Focusing […]