Archived posting to the Leica Users Group, 2012/10/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I'm gonna add some fuel to this fire. Maybe there is some technical witchcraft going on that I don't understand, or maybe some of you guys are just plain superstitious and Leica is talking a lot of impressive bullshit about lasers and suchlike. So here is the understanding I've had for years as to how Leica worked interchangeable lenses with a rangefinder mechanism. 1. The rangefinder was designed to work with a 50mm lens in that the as the lens unit moved to and from the film plane, the real end of the lens container pressed against a roller on a lever that actuated the rangefinder mechanism. Other lenses used a pair of threads (the technical term being differential threads) so that as the lens focussed (with greater motions if the focal length was more than 50mm and lesser motion if less than 50mm) the rear cylinder would move the same distance as that of a 50mm lens. With that kind of system, the only adjustment that would be possible would be setting the infinity stop and setting the distance marking ring to agree. Also, there is absolutely no reason for a digital camera to have any different focussing problems than a film camera. It just that the focus might be a bit more accurate since the sensor is rigid and there is always the possibility, despite a pressure plate, that the film is not exactly in a plane. Herbert Kanner kanner at acm.org 650-326-8204 Question authority and the authorities will question you. On Oct 11, 2012, at 10:30 PM, <tedgrant at shaw.ca> wrote: > Well OK my friend yer right! :-) > > But you know me and my anti-techie feelings that in many cases I openly > admit given the incredible things that can be adjusted and fixed these > days in many cameras and photographic equipment I'm truly clueless! But at > least I'm not afraid to admit it! > > Now I must go back and try my Nocti for sharpness one more time just in > case the cow dung splashed on it some years ago hasn't given the lens > constipation of focusing? :-) > > I must post the "Cow Dung Story" this week. :-) Sure be a surprise for the > new comers as most of the older lads and lasses have read or heard it! :-) > Damn it sure was an awful sight, me included! :-) > > Trust me it wasn't a pretty sight nor smell!! > > cheers, > ted. > > > > ----- Original Message ----- From: "Geoff Hopkinson" <hopsternew at > gmail.com> > To: "Leica Users Group" <lug at leica-users.org> > Sent: Thursday, October 11, 2012 9:28 PM > Subject: Re: [Leica] turn around time for coding lens for digital M's > > >> Aah, mon ami with utmost respect the adjustments might only have a 1% >> chance of transforming me into a Dr Grant or a Lluis or a HCB, this is >> true. However if the lens is well out of focus adjustment I have NO chance >> either! >> >> By the way for the Aussies, I just spoke with Camera Clinic's Leica lady. >> As of recently they can perform SOME work on the most modern FLE designs >> with maybe half still needing to go to Germany. It depends on what needs >> to >> be done. S lenses normally go to Solms. >> My Summilux 35 ASPH was adjusted under warranty and in Australia in >> approximately 3 weeks instead of 60-90 days >> They also can supply and fit replacement 6 BIT coded bayonet flanges for >> many lenses. That is new too and they just did that on one of two Elmarit >> M >> 90s I sent for CLA.. >> >> Cheers, >> Geoff >> http://www.pbase.com/hoppyman >> >> >> >> On 12 October 2012 12:07, <tedgrant at shaw.ca> wrote: >> >>> OH Hell!! >>> >>> Just keep clicking them on as I've done for 60 years and screw the costs >>> and supposed better operation!! >>> >>> Will all this extra stuff make your sight and observation of the magic >>> moment any better? ERGO? Your pictures will become icons as >>> HCB's???????? >>> Not a hope!! :-) >>> >>> So just click them on, get out and shoot cool photos and keep having >>> fun!!! >>> >>> See how easy it is when you use the KISS principal? ;-) ;-) ;-) >>> >>> cheers, >>> Dr. ted :-) :-) >>> >>> >>> ----- Original Message ----- From: "Geoff Hopkinson" <hopsternew at >>> gmail.com >>> > >>> To: "Leica Users Group" <lug at leica-users.org> >>> Sent: Thursday, October 11, 2012 4:25 PM >>> Subject: Re: [Leica] turn around time for coding lens for digital M's >>> >>> >>> George, my personal experience may not be directly helpful regarding the >>>> service you want, since we are on different continents. FWIW, one of >>>> mine >>>> went to Solms a couple of years back via dealer and then distributor. >>>> They >>>> did the organising but it was slow, slow and the dealer added his own >>>> mark >>>> up (as you might expect). >>>> . This week one lens of a pair that I sent for a CLA to the Australian >>>> agent actually had a flange replacement fitted. I didn't think that was >>>> done anywhere but Solms and New Jersey.. >>>> >>>> You might consider too whether you want a Clean, Lubricate and Adjust at >>>> the same time for specific lenses? >>>> I'd suggest that you ring up Leica in New Jersey directly first. You >>>> might >>>> find that faster in handling time than through your dealer? >>>> >>>> If you just want your existing bayonet flange machined with the pits >>>> (to a >>>> professional standard) then you could use John Milich in New York. >>>> Normally >>>> you send him the flange only but ask for a pricelist/services available? >>>> Try jm-at-milich-dot-com >>>> His machining is first class and his (international) turnaround was >>>> rapid >>>> on two jobs for ZM lenses for me a year or two back. I His >>>> communications >>>> might best be described as concise but his work is first class. >>>> >>>> My personal experience with the coding templates and Sharpies was not >>>> positive (reliability and permanence) but others have been happy. >>>> Ideally, >>>> you ought not completely degrease the mount either. Be aware that it is >>>> very important that you do nor smear incompletely dry ink across the 6 >>>> bit >>>> sensor or worse end up with scraped off residue inside the lens throat. >>>> One >>>> LUG M8 user I know personally had to scrub his M8 sensor cover glass >>>> vigorously, presumably with heart in mouth at the time! >>>> >>>> Cheers, >>>> Geoff >>>> http://www.pbase.com/hoppyman >>>> >>>> >>>> >>>> On 12 October 2012 08:38, Paul Roark <roark.paul at gmail.com> wrote: >>>> >>>> http://whimster-photography.**com/leica_m_lens_codes/index.**html<http://whimster-photography.com/leica_m_lens_codes/index.html> >>>>> >>>>> That table plus a Sharpie and it's done quick and for free. At least >>>>> for my Zeiss ZM lenses it's been a great solution. It does take a >>>>> little while to figure out a workflow to get them right. I put little >>>>> marks on the M9 mount where the read windows are. They can then be >>>>> put on the lens mount and make alignment relatively easy. (Alcohol >>>>> cleans off Sharpie marks.) >>>>> >>>>> Paul >>>>> www.PaulRoark.com >>>>> >>>>> >>>>> On Thu, Oct 11, 2012 at 3:11 PM, George Hartzell <hartzell at >>>>> alerce.com> >>>>> wrote: >>>>> > >>>>> > I've borrowed an M9 for a while with a couple of current lenses. I >>>>> > think that I'd like to get my pre-coding lenses updated. >>>>> > >>>>> > When all of you other first (second, third, ok, I'm late...) adopters >>>>> > took care this did you go through a local dealer, direct to Leica, or >>>>> > via an independent? >>>>> > >>>>> > What kind of turn around time did you experience? Cost? >>>>> > >>>>> > Thanks, >>>>> > >>>>> > g. >>>>> >>>>> > >>>>> > ______________________________**_________________ >>>>> > Leica Users Group. >>>>> > See > >>>>> > http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for >>>>> > > more information >>>>> >>>>> ______________________________**_________________ >>>>> Leica Users Group. >>>>> See >>>>> http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for >>>>> more information >>>>> >>>>> >>>> ______________________________**_________________ >>>> Leica Users Group. >>>> See >>>> http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for >>>> more information >>>> >>> >>> >>> ______________________________**_________________ >>> Leica Users Group. >>> See >>> http://leica-users.org/**mailman/listinfo/lug<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