Archived posting to the Leica Users Group, 1999/08/03

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Subject: Re: [Leica] 35 Summicron looseness of barrel problem
From: "Robert G. Stevens" <>
Date: Tue, 03 Aug 1999 10:15:52 -0300

I think this was discussed a few months ago and the answer was that Leica
puts a bit of lacquer on the focus mount to set something tight and this
can come off.  It does not affect lens performance, but a good technician
can fix it up by applying the lacquer again.



At 07:57 AM 8/3/99 -0400, you wrote:
>I was told by a well-regarded Leica dealer that the front assembly on the
pre-ASPH 35mm Summicron-M can be loosened by the slip-on
>plastic lens cap as well.  It's not uncommon to remove the cap, which fits
snugly, by giving it a twist and a pull.  Apparently that
>twist can loosen the front of the lens over time.  The cap should be
removed with a straight-off pull.
>Or, the cap should be tossed in a drawer and never used again.  I do tend
to remove the lens by twisting the hood, though.  I'll
>have to watch that.
>One other thought: Is this a consistent/persistent problem with this lens,
or is the problem only found in certain serial number
>ranges?  I have a late, German Summicron (3604252).  The front is nice and
tight, so far.
>> Date: Tue, 03 Aug 1999 07:47:22 +0100
>> From: Gerry Walden <>
>> Subject: [Leica] Re: Leica Users digest V10 #60
>> > From: "Simon Pulman-Jones"
>> > Subject: [Leica] 35 Summicron looseness of barrel problem
>> >
>> > The front element and aperture ring of my late non-asph. 35 Summicron
have a
>> > small but noticeable amount of looseness which means that they can be
>> > a little off the lens axis. I can't be certain that this has got worse
>> > recently or has always been this way - I can't say I've noticed any
>> > difference in the performance of the lens, but I'm worried that the
>> > looseness is going to get worse. I have never noticed this on any other
>> > Leica lens. Has anybody else noticed this with their 7-element 35
>> > Any experiences of getting the problem sorted? - there are no visible
>> > that might be tightened.
>> >
>> > Thanks,
>> >
>> > Simon.
>> >
>> I had the self same problem shortly after purchasing my 35mm lens from a
Leica dealer
>> secondhand (but pretty new).   I returned it to them and they told me it
can happen
>> sometimes - evidently a collar around the lens assembly can work loose.
>> tightened it up for me and it has been fine ever since.
>> Gerry (UK)