Archived posting to the Leica Users Group, 2001/02/06

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Subject: Re: [Leica] how can the 75 Lux focus go bad?
From: "Steve LeHuray" <icommag@toad.net>
Date: Tue, 06 Feb 2001 15:36:01 -0500

> Wide open and focused close, the depth of field of the 75/1.4 is between 6mm
> to 8mm (just over a quarter inch). This is remarkably difficult to calibrate
> for and, what amazes me, is that it can be done. Gerry at Kindermann Canada
> sometimes has to have the whole kit so that everything can be calibrated
> correctly.
>
> John Collier

John,

So does that mean once calibrated you should essentially weld that 75/1.4 to
the body? And would this also apply to the 50/1.0 and 1.4?

Steve
Annapolis

>
>> From: Andrew Moore <dmm@bronze.lcs.mit.edu>
>> Subject: [Leica] how can the 75 Lux focus go bad?
>> >>
>> I keep hearing people's accounts of their 75 Summiluxes focusing in front
>> of or behind the intended point of focus (recently 4 people and 5 lens
>> samples).  In a couple cases the lens (alone) was sent out for repair and
>> came back working.
>>
>> When these lenses go out of spec, what exactly is happening to them?
>>
>> --Andrew
>> NO ARCHIVE
>>
>>
>