Archived posting to the Leica Users Group, 1997/09/18

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Subject: Re:
From: Jim Brick <jim@brick.org>
Date: Thu, 18 Sep 1997 17:16:52 -0700
 
At 05:22 PM 9/18/97 -0400, you wrote:
>
>I have used, and now use, a 2X teleconverter, RF coupled, made by an
>offshoot of the Ukrainian FED works, with a 2/85 CZJ Sonnar, giving a
>5.6/170.  Plenty of depth of field.
>
>Marc
>

Is it f/2 --> f/4 or is it f/2.8 --> f/5.6 ? Someone will want to know.