Germany just can't get enough of Engadget, it seems. Just two weeks after the close of IFA in Berlin, we're back in the land of Bier and Honig, for a camera-fueled journey to Cologne. This giant photography trade show is held only once every two years -- the last Photokina was way back in 2010 -- and it's arguably the industry's biggest event, drawing manufacturers the world abound to launch their latest prosumer and professional devices. We won't likely see a blockbuster product like Samsung's Galaxy Camera, but ther