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[OM] How to Calculate magnification on reversing ring?

Subject: [OM] How to Calculate magnification on reversing ring?
From: William Clark <wclark@xxxxxxx>
Date: Fri, 30 Nov 2001 09:32:31 -0500
Anyone know how to calculate the life-size ratio when you reverse a lens?

Say we use a 24mm Zuiko, is this 2:1?  How does one figure it out?  Also,
say we use an extension tube for further magnification, how would one
calculate the new ratio?

Thanks!!!

-Bill
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