Here's an old time treat. Back when I was young, a great photography magazine published this "Exposure calculator" by S.P. Martin. It uses a 'slide' inside the folded paper sleeve to determine the pr
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Here's an old time treat. Back when I was young, a great photography magazine published this "Exposure calculator" by S.P. Martin. It uses a 'slide' inside the folded paper sleeve to determine the proper exposure for a long list...
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