Nikon is all about the "S" here in 2009. Nikon's newest pro-level DSLR checks in at $5,199.95, which is about $200 more than its predecessor, the D3. Notable upgrades come in the form of an HD video mode capable of capturing 1280 x 720 (720p) footage at 24 fps. There have also been some substantial upgrades in the ISO department. They have added a ISO 100 setting on the low end, as well as expanded sensitivity settings of ISO equivalent 25,600, 51,200 and an impressive 102,400.