Firmware Updates • Sigma Sigma DP2 Firmware Update Ver.1.04 2010-03-19by photoxels1 min read Sigma has announced a firmware update to its DP2 available for download March 26, 2010 [Why bother announcing it so early?] to improve auto focusing speeds. Download firmware update at: Sigma. 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)