Archived posting to the Leica Users Group, 2014/02/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Yes understood, Henning. Often my light hearted remarks (Adventurous) don't translate well. ;-) Cheers Geoff http://www.pbase.com/hoppyman On 13 February 2014 02:57, Henning Wulff <henningw at archiphoto.com> wrote: > Geoff, what I meant with that is that this isn't a matter of opinion, > maybe or phase of the moon, but a measurable quantity. So measuring is the > way to do it. > > It's always best to extend a collapsible lens before mounting or > unmounting it, but other than that measuring the rear protrusion vs. the > depth of the opening to the shutter will always tell you whether or not the > lens will cause problems. Clearly, if you have an M5 the depth of the > opening is to the metering cell, but otherwise it is to the shutter. > > I have measured and ascertained that old 50 Elmars, Summitars, Summars, > Hektors and Summicrons pose no threat whatsoever, and Super Angulons and > Hologons are also OK. The recent 50 Elmar is good, and the 90 macro Elmar > is of course good because a) it was designed for these cameras and b) it > really doesn't protrude at the back when collapsed. These are facts, based > on the dimensions of the products. > > An easy way to measure: Take a thin strip of paper, and stick it into the > lens opening parallel to the lens axis into the camera until it touches the > shutter. Mark where the paper touches the lensmount. Then take that strip, > and touch the end to the lens mount on the lens, and see if the mark you > have made extends beyond the end of the collapsed lens. Easy, and > definitive. > > Henning > > > > On 2014-02-10, at 3:47 PM, Geoff Hopkinson <hopsternew at gmail.com> wrote: > > > That really highlights different thinking or language on the topic I > guess. > > Henning isn't happy with my description 'adventurous' ;-) > > By that I meant, if you are wrong there is just some potential for damage > > and opinions aren't guarantees! > > To be pedantic then; if the retracted lens protrusion rearward does not > > contact the internal chamber or shutter mechanism or cam roller and you > > always fit and remove the lens while carefully maintaining it > perpendicular > > to the opening then there is no potential issue. If the dimensions are > > close and you are occasionally less than perfect in handling then it is > > possible to catch on one of those surfaces. > > Or you can tape or zip-tie the lens extended as Leica recommends and > avoid > > any possibility of contacting the interior of your camera body when > fitting > > or removing the lens. > > > > > > Cheers > > Geoff > > http://www.pbase.com/hoppyman > > > > > > On 11 February 2014 08:51, Steve Barbour <steve.barbour at gmail.com> > wrote: > > > >> > >> On Feb 10, 2014, at 2:21 PM, Henning Wulff <henningw at archiphoto.com> > >> wrote: > >> > >>> This has nothing to do with 'adventurous'. > >>> > >>> Measure it and you will KNOW. > >>> > >>> I've shot with the Heliar (Tom Abrahamsson's) on the M8, and don't > >> recall any problems. > >> > >> > >> no problems with the M8 or M9 but unknown for the M 240....measurements > >> are very ! close, if they are a tiny bit off you will eat your words... > so > >> be extremely careful, my solution, tape and a rubber band, lock the lens > >> fully extended... > >> > >> better safe than sorry > >> > >> > >> s > >> > >> > >> > >> > >>> If you give me a couple of days I'll be able to re-check for you, if > you > >> wish. I've also mounted and retracted a large variety of collapsible > >> lenses, except for the old 90 Elmar. I'd measure that one before I > >> retracted it as it sticks a long way in. > >>> > >>> However, the old Super Angulon f/3.4 fits and doesn't interfere with > the > >> shutter, and neither does the even more protruding Hologon. I've shot a > bit > >> with it on the M240, and while there is rather severe vignetting, that > is > >> really the only issue. > >>> > >>> Henning > >>> > >>> > >>> > >>> On 2014-02-10, at 1:24 PM, Geoff Hopkinson <hopsternew at gmail.com> > wrote: > >>> > >>>> Well there's the thing Steve! Has anyone ever tried? Some people > report > >>>> carefully retracting collapsible lenses into Leica bodies without > >> problems. > >>>> Leica themselves say don't do it (with their own designs). I have > never > >>>> seen the lens myself. > >>>> I guess if you owned one and were feeling adventurous you could try? > >>>> Personally I would not. You might try asking Stephen Gandy at > >> Cameraquest? > >>>> If you don't own one but are considering it for its very compact > >> properties > >>>> for carrying, you might look at the little Summarit or the Elmar M 50 > >>>> (which can be collapsed safely). I think that Lluis still has one for > >> sale > >>>> by the way. > >>>> > >>>> > >>>> > >>>> Cheers > >>>> Geoff > >>>> http://www.pbase.com/hoppyman > >>>> > >>>> > >>>> On 11 February 2014 00:27, Steve Barbour <steve.barbour at gmail.com> > >> wrote: > >>>> > >>>>> > >>>>> > >>>>> Sent from my iPhone > >>>>> Steve Barbour > >>>>> > >>>>> On Feb 9, 2014, at 11:53 PM, Geoff Hopkinson <hopsternew at > >>>>> gmail.com> > >> wrote: > >>>>> > >>>>> Camera Quest reported that it could be collapsed safely into the M8 & > >> M9 > >>>>> but advised caution. > >>>>> Isn't this a very rare lens? I had read of a run of 600 world wide. > >>>>> > >>>>> Very rare, can I use one safely on the M 240? > >>>>> > >>>>> thanks Geoff > >>>>> > >>>>> s > >>>>> > >>>>> > >>>>> Cheers > >>>>> Geoff > >>>>> http://www.pbase.com/hoppyman > >>>>> > >>>>> > >>>>>> On 10 February 2014 16:46, Steve Barbour <steve.barbour at > >>>>>> gmail.com> > >>>>> wrote: > >>>>>> > >>>>>> Compatible? Problems? > >>>>>> > >>>>>> many thanks, > >>>>>> > >>>>>> steve > >>>>>> > >>>>>> Sent from my iPhone > >>>>>> Steve Barbour > >>>>>> > >>>>>> _______________________________________________ > >>>>>> 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 > >>>>> > >>>>> _______________________________________________ > >>>>> 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 > >>>> > >>> > >>> > >>> Henning Wulff > >>> henningw at 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 > >> > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > > Henning Wulff > henningw at archiphoto.com > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >