So I just purchased a D4 and took it out on a session. Loved it. LOVED IT. I was using a D7100..... whoa big difference. So I imported through lightroom, made some color adjustments and exported with my same file settings (100% quality 350 dpi) My file inside lightroom was 4928x3280, I checked it on camera, same size. However, when I exported via lightroom, my files were half the size as my D7100 were producing. My average size on the D7100 was around 11-13MB and my D4 exported at roughly 4-6MB. I spent 2 hours on the phone with Nikon with no answer... I was hoping someone who actually shoots with a D4 can help me?! Thanks you thank you xoxo