Archived posting to the Leica Users Group, 2010/01/17

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Subject: [Leica] Collapsible 50mm Elmar and Summicron on M8 M9
From: lluisripollquerol at gmail.com (Lluis Ripoll Querol)
Date: Sun, 17 Jan 2010 20:18:51 +0100
References: <C7781932.5C0FD%mark@rabinergroup.com> <p06230904c7786180ac6c@[10.0.1.7]> <F524A8D0-C9B0-4AAB-887B-C5B88C940036@verizon.net>

Hi Len,

I collapse on all except the M8, I agree about the Nickel Elmar on my  
case on the IIIF, but the Summitar is not much bigger. Do you have the  
Hektor f6.3 2,8 cm? this one makes a really compact outfit too.

Cheers
Lluis


El 17/01/2010, a las 13:58, Leonard Taupier escribi?:

> I have measured the clearance distance of every collapsible lens I  
> own for the benefit of the LUG members. While I use every one of  
> them in my M8's, I have never collapsed one. There is only one  
> camera where I collapse a lens, a Leica II with a 50mm f3.5 nickel  
> Elmar I carry in my pocket sometimes.
>
> Len
>
>
> On Jan 17, 2010, at 1:52 AM, Henning Wulff wrote:
>
>> At 1:32 AM -0500 1/17/10, Mark Rabiner wrote:
>>>> 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
>>>>
>>>
>>>
>>> I'm dying to know how all  you guys have figured this all out!!!
>>> Leica says "don't put the retractable lens in your five thousand  
>>> dollar
>>> camera or...." so you guys go
>>> "I bet that's baloney" and do it anyway and then write about it.
>>> What if it WASN'T ok?
>>> One  five thousand dollar camrea off to Solms to have its insides  
>>> replaced?
>>> I can't figure this out!?!
>>>
>>> Just doing it super slow makes it safe? To me it just seems  
>>> impossible!
>>>
>>> [Rabs]
>>> Mark William Rabiner
>>>
>>>
>>
>>
>> You don't just take a lens, mount it and collapse it waiting for  
>> the crunch. You measure things first.
>>
>> It's quite easy to measure, and once you check what the mounting  
>> flange to shutter distance is, you know what to stay clear of. You  
>> then measure, on a removed but collapsed lens what the distance is  
>> between the lens' mounting flange and the back of the lens. You'll  
>> find that with all 50's there is plenty of clearance. You can also  
>> mount the Super Angulons, both f/4 and f/3.4 and even the Hologon f/ 
>> 8, although the latter produces some rather remarkable vignetting.
>>
>> You can also look to see what intrudes into the chamber between the  
>> mounting flange and the shutter from the top, bottom and sides and  
>> relate it to the greatest diameter of the collapsing tube, namely  
>> the three-prong locking claw.
>>
>> In any case, the only collapsible lens I have any doubts about is  
>> the old 90/4 Elmar (not the current macro Elmar). I don't have one  
>> to measure, but all other collapsible lenses, from old Nickel  
>> Elmars through Hektors, Summars, Summitars and Summicrons and newer  
>> Elmars clear everything easily. As mentioned before, best to mount  
>> the lenses in their extended condition, as careless, skewed mount  
>> could possible catch something (most probably the focussing arm).
>> -- 
>>
>>   *            Henning J. Wulff
>>  /|\      Wulff Photography & Design
>> /###\   mailto:henningw at archiphoto.com
>> |[ ]|     http://www.archiphoto.com
>>
>> _______________________________________________
>> 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



In reply to: Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] Collapsible 50mm Elmar and Summicron on M8 M9)
Message from henningw at archiphoto.com (Henning Wulff) ([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)