Sigma filed a patent in Japan for a 18-50 f/3.5-5.6 lens for APS-C mirrorless camera. During the CP+ show in February, Sigma announced that they will start producing lenses for Micro Four Thirds and E-mount camera systems. They even showed a prototype of a 30mm f/2.8 lens for E-mount (Sony).
- Patent# 2011-59293
- Focal length: 18.5958 - 48.4678mm
- Aperture: 3.4463 - 5.8200
- Angle of view: 74.7842 - 30.1732 °
- Back focus: 11.8343 - 36.5650mm
- Four aspherical surfaces