Archived posting to the Leica Users Group, 2014/02/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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