05-12-2018, 05:48 PM
All of a sudden when I put this lovely lens on my NEX-6 it seems the aperture value is not seen by the cam or not transmitted to the cam. Instead of say F4.0 it reads F--, at the same time there are weird clicking noises coming from within the lens and I cannot focus. Any ideas how to fix this? Do I need to send it for repair to Sigma Germany?