Firmware Updates • Sigma Sigma DP2 and DP2s Firmware Updates 2010-05-26by photoxels1 min read Sigma has released two firmware updates that “improves image quality at ISO 400”: Sigma DP2 Version 1.05 Sigma DP2s Version 1.01 Click to share on Facebook (Opens in new window)Click to share on X (Opens in new window)Click to share on Pinterest (Opens in new window)