Unless you've dealt with the practical limitations of film, you might not understand the challenges. As the last light of a summer evening dies away, an empty hopper train eases down the main line at Big Stone Gap in anticipation of a meet with another train, which isn't there yet. Without a tripod, and with Kodachrome K64 (ISO 64) in the camera, you open the aperture wide, dial up 1/60th shutter speed--grasp the telephoto lens in your left hand, try to get as still as possible, and take a deep breath. If you're lucky, you might capture at least one good image from the five or six you fire off. There's no depth of field, of course, because of the open aperture---but it's not too bad. Of course with a digital camera of today, this would be a piece of cake.
