Toronto. We are spoiled today. Our digital cameras automatically adjust settings to match the light. What was coal black a century ago is like daylight today. When dry plates and roll films arrived on the scene, development was split from exposure. A plate or film would be processed hours or days after the exposure. This made it critical that the exposure was correct.
Many gadgets and tables were produced all with the objective to give the aspiring photographer an idea of what setting to use for a given scene. In addition to tables and calculators, extinction meters and even exposure meters were offered. Sadly the extinction and exposure meters were far too slow to be of use. Even when I was a youth in the late 1950s, exposure meters were so slow that flash was preferred indoors or outdoors late in the afternoon and in the night (unless special effects were desired).

















