Working out Minimum Focusing Distance

Discussion in 'Large Format' started by natasha___, Sep 30, 1997.

  1. How does on work out the minimum focusing distance given the maximum extenstion of the camera, the focal lenght of the lens and the flange distance?

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    As an example for a 450mm lens with flange distance of 428.4mm and a 8x10 camera with a maximum extension of 570mm, what would be the minimum focusing distance and magnification?

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    Thank you.
     

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