Convert bmp to nef Online: bmp2nef
You can use Tom's Editor to easily convert images from
Microsoft Windows bitmap .BMP to Nikon Digital SLR Camera Raw Image File .NEF.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Format created by Microsoft for their Windows and OS/2 operating systems. Images can be compressed or not.
Nikon Digital SLR Camera Raw Image File is an image format with extension NEF.