[Leica] collapsible lenses on the M8...?

[shino at panix.com (Rei Shinozuka)]

i have to wonder if there was some other reason besides physical
clearance why Leica so strongly dissuades the use of collapsible 
lenses on the M8.  

as evidenced on page 86 of the manual under the section Leica M Lenses:
Important:

  * Can be used, but risks damaging the camera

    Lenses with retractible tubes can only be used WITH THEIR
    TUBES EXTENDED i.e., their tubes must NEVER be
    retracted into the LEICA M8.
  
    This is *not* the case with the current Macro-Elmar-M 
    90mm f/4, whose tube does not protrude into the
    camera body even when retracted.  It can therefore be used
    without any restrictions.

(the all-caps words are their italic emphasis)

-rei


On Feb28 12:24, Leonard Taupier wrote:
> I'm pretty sure Henning and certainly Jeffrey have more collapsible  
> lenses then I do but here are the lenses that I have that are fine  
> when collapsed in the M8.
> 
> LTM 5cm/3.5 Elmar (made in 1946) this has the longest recess but  
> still clears.
> LTM 50mm /2 Summicron (1955)
> LTM 50mm/ 2 Summitar (1949)
> LTM 5cm/2 Summar (1937)
> M 50mm/2 Summicron (1954)
> M 90mm/4 micro-Elmar (current model)
> 
> Len
> 
> 
> On Feb 28, 2008, at 10:59 AM, Henning Wulff wrote:
> 
> >>the old 50 summicron collapsible does.
> >>
> >>-rei
> >>
> >>On Feb27 14:01, Henning Wulff wrote:
> >>> At 12:45 PM -0700 2/27/08, Steve Barbour wrote:
> >>> >On Feb 27, 2008, at 11:43 AM, Henning Wulff wrote:
> >>> >
> >>> >>> Anyone out there using collapsible lenses on their M8, like me?
> >>> >>>
> >>> >>> so what do you use to keep them from collapsing?
> >>> >>>
> >>> >>> Yeah, yeah....I know, rubber bands...so what else is out there
> >>> >>>that will work,
> >>> >>>
> >>> >>> and guarantee that they won't collapse,  and screw the pooch?
> >>> >>>
> >>> >>>
> >>> >>> Anything?
> >>> >>>
> >>> >>>
> >>> >>> thanks, Steve
> >>> >>>
> >>> >>
> >>> >> Just let them collapse. The only one that _might_ have a problem
> >>> >>is the 90/4 (I haven't tried that). All the others are fine.
> >>> >
> >>> >
> >>> >no kidding Henning... !  We are under the false ! impression
> >>> >(created by Leica) that you can't use collapsibles on the M8....
> >>> >
> >>> >
> >>> >thanks, Steve
> >>>
> >>> Hi Steve,
> >>>
> >>> I checked clearances early on, and the only lens I have that I
> >>> wouldn't put on the M8 is my Hologon. Even the old collapsible  
> >>>Nickel
> >>> Elmar I tried recently can be collapsed and still have about 4mm
> >>> clearance. The 2.8 Elmars and f/2 lenses don't collapse as much, so
> >>> there is even more clearance from the shutter.
> >>>
> >>>
> >
> >
> >Hi Rei,
> >
> >I'm not sure I understand what you're saying.
> >
> >The old Summicron does what? Collapse as much as the Nickel Elmar?  
> >I don't think so; the travel of the barrel into the body is less.  
> >In any case, there is no problem collapsing the lens into the M8.
> >
> >Regards,
> >
> >Henning
> >
> >_______________________________________________
> >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

-- 
Rei Shinozuka shino@panix.com
Ridgewood, New Jersey