Sigma patents a new 14mm f/4.0 for APS-C E-mount August 12, 2016 rumors 0 Comments Sigma keeps working on new E-mount lenses. That patent discloses a 14mm f/4.0 lens made for APS-C mirrorless cameras. I hope one day Sigma will start to design lenses for the Full Frame E-mount system too! Source: Egami. Via Mirrorlessrumors. **This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links.