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1/(Focal Length) = 1/(d1) + 1/(d2)
by zackdezon
Users Who Selected '1/(Focal Length) = 1/(d1) + 1/(d2)' by zackdezon as a Favorite Photograph (28):
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 RevMike 2/9/16 
 MacDonald 11/9/11 
 blacksmyth2025 3/13/11 
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 isean 9/17/08 
 jbushy 9/2/08 
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 cools98 8/31/08 
 bgreene 8/30/08 
 char1775 8/28/08 
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 bubba53 8/27/08 
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 fabiodsp 8/27/08 
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 rufty 8/26/08 
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