COSINA filed a patent describing 50mm F1.5 with a variable soft – focus effect . [Title of invention] Imaging lens Focal length (mm): 50.5 F number: 1.562 Angle of view (degree): 46.311 Image height (mm): 21.633 Lens length (mm): 76.576 Back focus (mm): 31.879 Fig. 1 Fig . 2. Fig. 5. via j-platpat, hi-lows-note.blog Related posts: Voigtlander MACRO APO LANTHAR 110mm f/2.5 and COLOR-SKOPAR 21mmF3.5 Aspherical Announced Voigtlander 35mm … Continue reading Voigtlander 50mm f/1.5 Soft Focus Lens Patent Found