Does the 16" have a 50% obstruction? If it is f9 I would think the obstruction would be less than 40% (I'm known for getting calcs wrong though).
For the non Deutsch public, on that image t he heading on the left says 'before optimisation' for the 0.278 figure and the heading on the right says 'after optimisation' for the 0.904 figure.
Last edited by Poita; 12-02-2013 at 11:01 PM.
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