Can you use the Samyang 14mm T.3.1 Cine lens for still photography? I understand this is designed for video and it's aperture ring is declicked for smoother transition of aperture size. Not sure if that should be a problem when taking photographs though. Anyone used this particular lens to for still photography (if that is even possible with this lens) ? If it works, how does it compare to its younger brother cousin Samyang 14mm f2.8.? I am using a 5D3. Thanks.