Archived posting to the Leica Users Group, 2010/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Jan 16, 2010, at 7:25 PM, Rei Shinozuka wrote: > i considered the dust argument also, and it does have merit. just imagine > all that does flying around as you work that lens like an accordion. no pumping allowed, just can you use the lens safely without a disaster in the event of worst case scenario, sounds good, but I suspect intentional collapsing even one time, not likely, Steve > > remember that only with film do you get a fresh, clean, brand-new sensor > with each and every exposure! > > -rei > > > Jim Nichols wrote: >> Len, >> >> Another thought that occurred to me was that frequently opening and >> collapsing the lens can pump dust into the inside of the camera. And >> lenses like my old 50/3.5 Elmar, with worn felt seals, have a lot of >> "wobble" when moving in and out. >> >> Jim Nichols >> Tullahoma, TN USA >> ----- Original Message ----- From: "Leonard Taupier" <len-001 at >> verizon.net> >> To: "Leica Users Group" <lug at leica-users.org> >> Sent: Saturday, January 16, 2010 8:20 PM >> Subject: Re: [Leica] Collapsible 50mm Elmar and Summicron on M8 M9 >> >> >>> 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 >>> >>> >>> On Jan 16, 2010, at 8:30 PM, Rei Shinozuka wrote: >>> >>>> I only have 2 collapsibles, the summitar and summicron. (the summitar >>>> has the conical IR-cut filter created kindly for me by Len Taupier) i >>>> can't say what the long-term effect of constant collapsing of these >>>> lenses into the M8 is, but i have mounted both and collapsed both on >>>> the M8, and it won't smash the shutter or anything dramatic like that. >>>> on the other hand, when collapsing you do sometimes feel something >>>> contact inside when the lens is half-collapsed--i think it's the >>>> protrusions in the film chamber to the left and right behind the >>>> bayonet contacting the lens tube as it goes back. the lens continues >>>> to collapse without force. >>>> >>>> In summary: >>>> 1. you can fully collapse the lenses on an M8 >>>> 2. they don't smash the shutter. >>>> 3. the tube seems to gently contact something inside the film chamber, >>>> but there's no discernible damage. >>>> 4. officially the makers warn against collapsing these lenses, but >>>> it's not clear why. >>>> 5. since the fit of the back of the focus tube is tight inside when >>>> collapsed, i'd recommend not mounting and removing lenses when in >>>> collapsed state. >>>> >>>> -rei >>>> >>>> >>>> Lluis Ripoll Querol wrote: >>>>> Hi Len, >>>>> >>>>> I'm glad you are fine!, happy new year and I hope continue seeing >>>>> your pictures, particularly those so nice with your beautiful >>>>> Summarex!. >>>>> >>>>> I've used very few these collapsible lenses on the M8, and I'll keep >>>>> careful without collapsing. >>>>> >>>>> Nice to meet you again on the LUG, >>>>> >>>>> Keep wel, >>>>> Cheers >>>>> Lluis >>>>> >>>>> Lluis Ripoll Querol >>>>> lluisripollquerol at gmail.com >>>>> >>>>> http://gallery.leica-users.org/v/luisrq/ >>>>> http://photo.net/photos/lluisripoll >>>>> Blog: >>>>> http://lluisripollphotography.wordpress.com/ >>>>> >>>>> http://www.lrmusic.es >>>>> >>>>> El 17/01/2010, a las 1:44, Leonard Taupier escribi?: >>>>> >>>>>> Hi Lluis, >>>>>> >>>>>> Yes I'm fine. I browse the LUG from time to time and Steve's >>>>>> question caught my eye. Yes the Summicrons and Elmars are OK. The >>>>>> screw mount f3.5 Elmars are a little close though. I use them all on >>>>>> my M8s but keep them extended. >>>>>> >>>>>> Len >>>>>> >>>>>> >>>>>> On Jan 16, 2010, at 3:08 PM, Lluis Ripoll Querol wrote: >>>>>> >>>>>>> Hi Steve, >>>>>>> >>>>>>> As far as I know you can collapse Summicrons and Elmar on the M8, >>>>>>> I've have both but I've never collapsed on..., I'm careful. I >>>>>>> remember this question was answered longtime ago by an our expert >>>>>>> friend Leonard Taupier, I hope he is well. >>>>>>> >>>>>>> Amiti?s >>>>>>> Lluis >>>>>>> >>>>>>> >>>>>>> >>>>>>> El 16/01/2010, a las 19:25, Steve Barbour escribi?: >>>>>>> >>>>>>>> Again the current M9 manual warns against using collapsible lenses >>>>>>>> with the M9, in the collapsed ie non extended mode. >>>>>>>> >>>>>>>> >>>>>>>> I recall a LUGer, with plenty of experience, has said that the >>>>>>>> 50mm Collapsible Elmars and Summicrons are in fact not a risk to >>>>>>>> the M8 & M9 even when collapsed.... >>>>>>>> >>>>>>>> Is this correct? >>>>>>>> >>>>>>>> >>>>>>>> thanks, >>>>>>>> >>>>>>>> Steve >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> 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 >>>> >>>> _______________________________________________ >>>> 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