Sigma dp0 Quattro

The Sigma dp0 Quattro is a large sensor digital compact camera announced by Sigma Corporation on February 10, 2015. As of the time of its release, it has the widest angle of view of any Sigma DP compact camera.
Software.
Sigma Photo Pro.
Postprocessing of raw X3F and JPEG of all digital Sigma cameras
Version 6.x is free Download for Windows 7+ und Mac OS ab Version 10.7 (6.3.x). Actual Versions are 6.5.4 (Win 7+) and 6.5.5 (MacOSX 10.9+).