In a bid to give Canon's PowerShot G1 X a run for its money, Nikon is pulling out every stop it knows with the introduction of the Coolpix P7700. It's a decidedly prosumer model, priced at a buck under $500 and equipped with a 1/1.7-inch 12.2 megapixel BSI CMOS sensor, 7.1x zoom lens (with a maximum aperture of f/2), 1080p movie mode, Lens-Shift Vibration Reduction and full manual control for those who abhor automatic captures. On the opposite side of the spectrum, there's the $179 Coolpix S01 -- a bantam P&S camera that's bound to snake it