Thread: Measuring points to gain focal length?
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Old 10-08-2009, 07:32 PM
Ian Robinson
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Ian Robinson is offline 		 
Join Date: Jan 2007
Location: Gateshead
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Play with his handy program http://www.catseyecollimation.com/designie5.html

it'll give you a handle on this and help you calc the point there the focal point is in your scope.
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