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Re: [OM] Magnification factors

Subject: Re: [OM] Magnification factors
From: "Paul Farrar" <farrar@xxxxxxxxxxxx>
Date: Fri, 9 Aug 2002 10:43:43 -0500 (CDT)
Effective f# = (m+1)*(marked f#), where m is magnification
In stops, it's log((m+1)**2)/log(2)

> 
> I must be a complete dolt.  I know it has been discussed recently, but I
> cannot find the exposure compensation factors when doing macro work.
> 
> Help!
> 
> Bob
> 
> 
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