The most recent firmware update for the SB-900 Speedlight is version 5.02 which was released in November of 2008. The "Update" date reflects a change to the web page while the "Published" date is the date of the firmware itself.
If the firmware on your SB-900 is older than version 5.02 then you can use your D800 to do the update. Any DSLR that shows the "S" firmware option when a speedlight is attached can be used to do a Speedlight firmware update.
Firmware version 5.02 can be downloaded from this address:http://support.nikonusa.com/app/ans...
answered 2 years, 7 months ago
2 years, 7 months ago