Archived posting to the Leica Users Group, 2003/01/27

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Subject: Re: [Leica] The 40/2.0 Was Sharp, But...
From: John Collier <jbcollier@shaw.ca>
Date: Mon, 27 Jan 2003 19:57:54 -0700

If you are holding it as described, then you file the lower edge. 
Please mask the lens carefully so none of the filings get on the glass 
or in the works. Remember to de-burr the edges too!

John Collier

On Monday, January 27, 2003, at 07:37 PM, Jerry Lehrer wrote:

> Now all I need is to know which edge
> to file down, the upper or lower?
>
>
> John Collier wrote:
>
>> Look at the back of the lens with the red mounting dot on your right.
>> Now look straight across and then up to the nearest bayonet ear. That
>> is the one which needs to be filed down.
>>
>> Or, if the red dot is at three o-clock then the bayonet ear that needs
>> filing is at 10 o-clock.
>>
>> John Collier
>>
>> On Monday, January 27, 2003, at 10:23 AM, Jerry Lehrer wrote:
>>
>>> Yes, that is the way, but which ear, and which side of the ear.  I
>>> remember doing that 40 years ago to a 35mm RF Summaron to
>>> permit using it on my first M2.  However I don't recall how I did it.
>>>
>>> At the time I had a borrowed 35mm Summicron with which to
>>> compare it.

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