After a (thankfully brief) wait, Nikon's super-speedy J4 mirrorless camera is coming to the US -- and it's bringing along a low-cost counterpart, the S2. You should see the J4 arrive later this month for $650 with a standard 10-30mm zoom lens, or about $50 more than the outgoing J3. It'll also be available in an $850 kit with a more flexible 10-100mm lens, and a $1,050 bundle is on tap if you want both the 10-30mm glass and a long-range 30-110mm telephoto lens. As you'd expect, the hardware hasn't changed in the few weeks since Nikon first unveiled the J4. You're still getting the new 18.4-megapixel sensor and Expeed 4A image processor that, combined, let you pump out photos at a steady 20 frames per second with advanced autofocusing (171 contrast detection points and 105 phase detection points). You'll also enjoy relative luxuries such as a touchscreen and WiFi photo sharing.