Archived posting to the Leica Users Group, 2003/02/13

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Subject: Re: [Leica] Re: Hexar RF Back focus one more time
From: Dante Stella <dante@umich.edu>
Date: Fri, 14 Feb 2003 01:34:47 -0500

The only thing that would prevent you from eventually harmonizing 
everything would be if Hexanons had RF couplings that were normalized 
at something other than a 51.6mm normal lens.

On Friday, February 14, 2003, at 01:03 AM, Paul Jones wrote:

> Hi Stephen,
>
> Okay so if the back focus can be adjusted to  work with Leica and CV 
> lenses,
> does this mean it would also be out with a Hexanon lense?
>
> What i mean is the back focus a problem with the body, or is that the
> hexanon lenses are designed for a different back focus from the Leica 
> and CV
> lenses?
>
> Regards,
> Paul
>
>
>> or a 12/5.6 at infinity.
>>
>> I was surprised to find my shots with the Voigtlander 12  and Hexar 
>> RF of
> the
>> John Travalta film Swordfish weren't as sharp as my first 12 test 
>> shots on
> my
>> M6.   (the scene with the bus on its side in front of the bank was 
>> shot on
>> Main Street in Ventura CA).    I had the Hexar RF back focus checked, 
>> and
> it
>> was off.  It was fixed thru a friend at Konica Japan.    Since the 
>> factory
>> can fix the Hexar RF problem if it wants to, it completely escape me 
>> why
> some
>> claim there is no problem just because they have not personally
> encountered
>> it.    Bob Shell's  Hexar RF was also out of specs.  His was fixed by 
>> Ken
>> Ruth at Photography on Bald Mountain.     certainly not all Hexar RF's
> have
>> back focus problems, but some certainly do.   the only way to be sure 
>> is
> to
>> have a particular Hexar RF body checked by a good Leica tech.
>>
>> Stephen
>>
>> Dante Stella wrote:
>>
>>> Dead wrong.  A fast wideangle at infinity, like a 21/2.8.  That is
>>> where if you have any error in back focus, you will focus in front of
>>> or behind infinity.
>>
>>
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>
____________
Dante Stella
http://www.dantestella.com

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