Sun 06-Jan-13 03:56 PM | edited Sun 06-Jan-13 03:58 PM by briantilley
Welcome to Nikonians, Bob
Answer 1: You're correct that the choice of Image Size - L, M or S - applies only to JPG images.
Answer 2: Whilst NEF images are always native size, the D800 has a selection of Crop Modes which use smaller areas of the sensor, and thus produce lower NEF file sizes. The pixel dimensions of the various crop options are:
FX (the whole sensor) - 7360 x 4912 5x4 - 6144 x 4912 1.2x - 6144 x 4080 DX - 4800 x 3200
NEF file sizes can also be reduced by selecting one of the Compressed NEF options, as mentioned above.