The latest firmware upgrades for the Sigma sd Quattro and sd Quattro H cameras is designed to improve performance in low temperatures.
Firmware Version 1.09 for the sd Quattro and Version 1.05 for the sd Quattro H also address issues with inconsistent performance of the viewfinder, main display, shutter and image saving. The update for the sd Quattro can be downloaded from https://www.sigma-global.com/en/download/cameras/firmware/#sd, while the update for the sd Quattro H is available at https://www.sigma-global.com/en/download/cameras/firmware/#sd-h.
