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[Post New]9 May 2007 20:51:40 IST
    Subject: focal length
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Mr.IITIAN007 (3000)

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I am not stating about the powers here.I am not talking about any shortcut.I know there are many numericals based on 'focal length of the combination' but this is a unique one.I have tried applying the basic formulas but at last two variables are remaining which does not give the correct answer.
Ken
From: UNITED STATES, Green Bay, Wisconsin
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