I generally recommend bringing a wide-angle lens (e.g., 16-35 mm), a mid-range zoom lens (e.g., 24-70 mm), and a telephoto lens (e.g., 70-200 mm); all focal lengths are full frame equivalent. But you can take great images even without a camera with interchangeable lenses. I’ll teach you how to use your compact camera or a smartphone to the max so you take great photos of Prague.