The NJB file extension if used by Nikon for their digital cameras.
The file contains an index of images that have been taken with the digital camera and are saved on the camera’s memory card. These files are used by the camera and associated software and were not designed to be opened by the user.
.njb File Extension
Developer:
Nikon
File category:
What are njb files & how to open them - Nikon Digital SLR Camera Image Index File
File category:
Developer:
Nikon