Sigma has posted a firmware update for the Sigma SD1 and SD1 Merrill cameras. Firmware version 1.11 for the SD1 and version 1.06 for the SD1 Merrill is now available for download.
Sigma SD1 / SD1 Merrill firmware updates enable chromatic aberration correction with the Sigma 18-35mm f/1.8 DC HSM lens, which is especially useful for images shot at or aroud f:1.8.
Sigma SD1 / SD1 Merrill Firmware Update
You can download the firmware updates from the websites below.