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Re: [OM] Manual Focus vs AF

Subject: Re: [OM] Manual Focus vs AF
From: Moose <olymoose@xxxxxxxxx>
Date: Sun, 10 May 2009 01:43:12 -0700
Chris Crawford wrote:
> Moose,
>
> That fits my samples too. My dad's lens with the slow aperture is an even 
> older one than yours: 3,234,xxx
>
> The two good mij's that I have are in the 5,8xx,xxx range. They must have 
> improved them along the way!
>   

Ah! More data points!. My suspicion is that the problem was a lubricant 
for the focusing helicoid that broke down with, time, heat and use.

No particular reason why they would happen to change lubricants just at 
the other changeover. Maybe they later became aware of the problem as 
early MC lenses starting acting up, or maybe just good luck with a 
change made for another reason. My more limited experience with MC 
marked versions was of a couple or three with issues and one nicely 
snappy.There could also have been differences in different batches of lube.

Moose
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