Archived posting to the Leica Users Group, 2014/02/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Neither do mine, Geoff, neither do mine. On Wed, Feb 12, 2014 at 3:29 PM, Geoff Hopkinson <hopsternew at gmail.com>wrote: > 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 > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Regards, Sonny http://sonc.com/look/ Natchitoches, Louisiana 1714 Oldest Permanent Settlement in the Louisiana Purchase USA