On command, My Canon 7D offers a variety of useful information. Here’s the in-camera thumbnail of NECR’s GP38s crossing Rt32 in South Monson with relevant histogram as displayed on camera screen. Learning to interpret the graph is extremely useful in making exposures in difficult situations. While I’ve balanced the exposure to favor detail on the locomotives, I’ve managed to retain satisfactory levels of detail in the piles of snow both side of the tracks. The image was exposed using my Canon 40mm Pancake lens.