Archived posting to the Leica Users Group, 2002/05/18

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Subject: Re: [Leica] Hexar/Leica back focus data point
From: John Collier <jbcollier@shaw.ca>
Date: Sat, 18 May 2002 22:35:38 -0600

http://greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=0098np

On Saturday, May 18, 2002, at 10:21 PM, Stephen Gandy wrote:

> Hi Paul,
>
> can you supply an URL for the Keppler post ?
>
> Thanks,
>
> Stephen
>
> Paul Chefurka wrote:
>
>> the Greenspun board has been set a-buzzing by a letter from Herb 
>> Keppler
>> stating that Pop Photo found a 1mm difference between the back focus 
>> of the
>> Leica and the Hexar RF.  That seemed to me like an absurd amount.
>>
>> I just put up a page with the results of a test I did to see if my 
>> Hexar RF
>> and my Leica M6 would produce identical results when using a wide angle
>> lens, wide open, focussed at infinity (the most sensitive test for back
>> focus differences).
>>
>> http://www.chefurka.com/Misc/BackFocus.html
>>
>> Paul

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