Not to be outdone by Nikon’s announcement of its D600 last week, Canon is striking back with its own entry-level full-frame camera, at an even more aggressive price: the EOS 6D ($2,100-$2,900). Effectively a replacement for the 5D Mark II, this DSLR is sure to become a favorite among both prosumer photographers and professionals looking for a lower-cost second full-frame body. It’s slightly smaller than its predecessors, but still packs…
