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Old Feb 25, 2007, 12:17 AM   #3
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Join Date: Feb 2005
Posts: 625
Default has a very similar slide calculator. Their's is a Day & Night exposure guide. They are made of heavy cardboard covered with clear plastic. Plus they have several other laminated cards for different things like hyperfocal distances, high key, and low key photography, fill flash tips, all kind of different cards. The day & night exposure guide I think is about $20, a little pricy maybe, but well made. the other cards are $5 each.
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