The Nikon 1 J4 is the followup to last year’s J3. With fierce competition on every side (Sony A5000 and Olympus OM-D E-M10, to name two), Nikon had no choice but to upgrade its mirrorless camera. The J4 packs an 18.4-megapixel AF CMOS sensor, Expeed 4A image processing engine, ISO […]