Archived posting to the Leica Users Group, 1996/04/16

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Subject: Re: 100mm/2.8 R APO Macro question
From: Bill Christensen <>
Date: Tue, 16 Apr 1996 11:21:31 -0500
References: <>


One additional comment.  Essentially, you are looking at a trade off.  On the positive side, if you use the 2X 
extender, additional lens to subject distance will be gained - although such distance may not be needed in 
many applications.  On the negative side, two f-stops will be lost.  Since the lens will most likely be closed 
down to around f22 at 1:1, such a light loss may present a significant handicap.  This depends, of course, upon 
whether natural (my preference) or artificial light is employed.

Bill Christensen

Replies: Reply from Eric Welch <> (Re: 100mm/2.8 R APO Macro question)
Reply from William Hong <> (Leica M Lens Carrier?)
In reply to: Message from (Roger L. Beamon) (Re: 100mm/2.8 R APO Macro question)