I recently bought a D5100 that came with the kit lens, and I also bought a 50mm f/1.8g, and a 55-200mm. I'm doing a once in a lifetime tour of a closed and sealed missile base with the military historian. Which lens works best in low light? The only light will be what we bring with us, as it's 50 feet underground with no power since 1965, and it's huge. One of the rooms is 120' round with a 50 foot high ceiling. I'm getting short on time, and if I need to buy something I need to know soon.