Interesting: The Gear Behind NASA's Cool-Looking Space Cameras
How Does NASA Get a Nikon D2Xs DSLR Ready to Go to Space? | Popular Photography
The camera that an astronaut uses is a retail Nikon D2X with NASA-specific firmware and special lubricant for space operation. Thrown on top of the rig is a modified Nikon SB-29 sync cord that lets the astronaut attach an auto-focus illuminator for taking photos in low-light conditions.
The camera also includes a Nikon SB-800 Flash housed in a specialized case suited for space. Both the flash unit and the bracket are then enclosed in a pressurized space blanket.
I never thought of a flash not working in the vacuum of space. hah