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?


    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?


    Thank you.

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