For those of you amateur photographers out there who like shooting film, sometimes old cameras don't have the right light meter for getting the correct exposure. Sometimes they are faulty, inaccurate or have no light meter at all! Photographic light meters can be pretty expensive but analog foot-candle meters are cheap because they don't really have any photography purpose, until now. Tthis guide will show you how to put it to work for photography.
Foot-candles are a unit of light that can be directly correlated to Exposure Values (EV) which are a list of simplified amounts of light and are often referenced to possible scenarios which you might find this amount of light in. Paper exposure calculators work on the principle of manually identifying an exposure value based on the description and then aligning the EV scale with your film sensitivity to deduce shutter speed/aperture combinations for your camera.
FC and EV are directly related, so modifying the meter back-panel is all that is required to turn a FC meter into an EV meter, and it works great. It takes all the guesswork out of using a paper exposure calculator which is great for beginners.