Archived posting to the Leica Users Group, 2010/01/16

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Subject: [Leica] Collapsible 50mm Elmar and Summicron on M8 M9
From: jhnichols at lighttube.net (Jim Nichols)
Date: Sat, 16 Jan 2010 21:03:00 -0600
References: <242A8955-904A-415E-BD08-EB97980BD6EA@gmail.com><7E6CFECA-447E-450A-B45F-411639CDA1F1@gmail.com><8380A191-AA12-4475-9D30-88FF60E1ADE6@verizon.net><B9039A2E-65B0-48A5-98A5-B63D2E19C33C@gmail.com><4B526852.6000105@panix.com> <1B6A19FB-88E1-4CE9-9B4F-3EE6C69FD13E@verizon.net>

Len,

Another thought that occurred to me was that frequently opening and 
collapsing the lens can pump dust into the inside of the camera.  And lenses 
like my old 50/3.5 Elmar, with worn felt seals, have a lot of "wobble" when 
moving in and out.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Leonard Taupier" <len-001 at verizon.net>
To: "Leica Users Group" <lug at leica-users.org>
Sent: Saturday, January 16, 2010 8:20 PM
Subject: Re: [Leica] Collapsible 50mm Elmar and Summicron on M8 M9


> Rei,
>
> I think it may be a disclaimer in case something goes wrong when 
> inserting a lens with some sort of fault. As an example look at the  end 
> of your Summitar. There are 3 fingers that have slots bent up to  provide 
> a snug fit to the barrel when the lens is extended. If one of  these 
> fingers get bent up too far it can hit the shutter in the  collapsed 
> condition. Just an idea. Also I believe the old collapsible  90mm Elmar 
> can hit the shutter.
>
> Len
>
>
> On Jan 16, 2010, at 8:30 PM, Rei Shinozuka wrote:
>
>> I only have 2 collapsibles, the summitar and summicron.  (the  summitar 
>> has the conical IR-cut filter created kindly for me by Len  Taupier) i 
>> can't say what the long-term effect of constant  collapsing of these 
>> lenses into the M8 is, but i have mounted both  and collapsed both on the 
>> M8, and it won't smash the shutter or  anything dramatic like that.  on 
>> the other hand, when collapsing  you do sometimes feel something contact 
>> inside when the lens is  half-collapsed--i think it's the protrusions in 
>> the film chamber to  the left and right behind the bayonet contacting the 
>> lens tube as  it goes back.  the lens continues to collapse without 
>> force.
>>
>> In summary:
>> 1. you can fully collapse the lenses on an M8
>> 2. they don't smash the shutter.
>> 3. the tube seems to gently contact something inside the film  chamber, 
>> but there's no discernible damage.
>> 4. officially the makers warn against collapsing these lenses, but  it's 
>> not clear why.
>> 5. since the fit of the back of the focus tube is tight inside when 
>> collapsed, i'd recommend not mounting and removing lenses when in 
>> collapsed state.
>>
>> -rei
>>
>>
>> Lluis Ripoll Querol wrote:
>>> Hi Len,
>>>
>>> I'm glad you are fine!, happy new year and I hope continue seeing  your 
>>> pictures, particularly those so nice with your beautiful  Summarex!.
>>>
>>> I've used very few these collapsible lenses on the M8, and I'll  keep 
>>> careful without collapsing.
>>>
>>> Nice to meet you again on the LUG,
>>>
>>> Keep wel,
>>> Cheers
>>> Lluis
>>>
>>> Lluis Ripoll Querol
>>> lluisripollquerol at gmail.com
>>>
>>> http://gallery.leica-users.org/v/luisrq/
>>> http://photo.net/photos/lluisripoll
>>> Blog:
>>> http://lluisripollphotography.wordpress.com/
>>>
>>> http://www.lrmusic.es
>>>
>>> El 17/01/2010, a las 1:44, Leonard Taupier escribi?:
>>>
>>>> Hi Lluis,
>>>>
>>>> Yes I'm fine. I browse the LUG from time to time and Steve's  question 
>>>> caught my eye. Yes the Summicrons and Elmars are OK. The  screw mount 
>>>> f3.5 Elmars are a little close though. I use them all  on my M8s but 
>>>> keep them extended.
>>>>
>>>> Len
>>>>
>>>>
>>>> On Jan 16, 2010, at 3:08 PM, Lluis Ripoll Querol wrote:
>>>>
>>>>> Hi Steve,
>>>>>
>>>>> As far as I know you can collapse Summicrons and Elmar on the  M8, 
>>>>> I've have both but I've never collapsed on..., I'm careful.   I 
>>>>> remember this question was answered longtime ago by an our  expert 
>>>>> friend Leonard Taupier, I hope he is well.
>>>>>
>>>>> Amiti?s
>>>>> Lluis
>>>>>
>>>>>
>>>>>
>>>>> El 16/01/2010, a las 19:25, Steve Barbour escribi?:
>>>>>
>>>>>> Again the current M9 manual warns against using collapsible  lenses 
>>>>>> with the M9, in the collapsed ie non extended mode.
>>>>>>
>>>>>>
>>>>>> I recall a LUGer, with plenty of experience, has said that the  50mm 
>>>>>> Collapsible Elmars and Summicrons are in fact not a risk  to the M8 & 
>>>>>> M9 even when collapsed....
>>>>>>
>>>>>> Is this correct?
>>>>>>
>>>>>>
>>>>>> thanks,
>>>>>>
>>>>>> Steve
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Leica Users Group.
>>>>>> See http://leica-users.org/mailman/listinfo/lug for more  information
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Leica Users Group.
>>>>> See http://leica-users.org/mailman/listinfo/lug for more  information
>>>>
>>>>
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>>>
>>>
>>> _______________________________________________
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>>
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>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>
> 




Replies: Reply from shino at panix.com (Rei Shinozuka) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
In reply to: Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
Message from lluisripollquerol at gmail.com (Lluis Ripoll Querol) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
Message from len-001 at verizon.net (Leonard Taupier) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
Message from lluisripollquerol at gmail.com (Lluis Ripoll Querol) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
Message from shino at panix.com (Rei Shinozuka) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
Message from len-001 at verizon.net (Leonard Taupier) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)