Nikon has updated the firmware of its D4 professional SLR to version 1.02, allowing more-vivid display of images shot in the Adobe RGB colour space, improving the stability of FTP upload connections and fixing various other minor issues. Meanwhile Sigma has released firmware updates for its SD1 and SD1 Merrill SLRs (versions 1.07 and 1.02 respectively), both of which promise to improve startup times, allow a dedicated flash to be used in manual mode with mirror lockup, and fix various bugs. Click the links below to download the updates.

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Click here for Nikon D4 Firmware Update 1.02 

Click here for Sigma SD1 Merrill Firmware version 1.02 

Click here for Sigma SD1 Firmware version 1.07