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| In response to several requests for measurements of the aperture, I have produced a series of photographs to demonstrate why this is not quite as easy a task as one would imagine. The aperture is 3 dimensional and shows a highly complex interaction between it's surfaces, edges and curves. To work out the mathematics will require specialist laser mapping equipment. http://www.themodernantiquarian.com/site/11#post-96548 Reply | with quote |  16th May 2011ce 17:40 |
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