Sigma SD1 / SD1 Merrill Firmware Update
Sigma has posted a firmware update for the Sigma SD1 and SD1 Merrill cameras. Version 1.11 for the SD1 and version 1.06 for the SD1 Merrill 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. You can download the firmware upgrade from the websites below.
Website: Sigma SD1 Firmware Update
Website: Sigma SD1 Merrill Firmware Update