NEF File

One D5100/D7000 NEF file contains 4 pictures: There is a utility to dump contents of Nikon Electronic Format File (NEF).
 * 1) Uncompressed thumbnail 160 x 120
 * 2) Full scaled jpeg (L size) 4928 x 3264
 * 3) Full scaled Huffman compressed RAW picture (14-bit) 4992 x 3280
 * 4) Jpeg thumbnail (in Exif MakerNote tag) 576 x 375