Archived posting to the Leica Users Group, 2010/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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. 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