Archived posting to the Leica Users Group, 2001/06/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Seth Rosner wrote: >>>>> It seems to me that you may be overly worried about a problem that doesn't exist. Again, as Ted says, go forth and take pictures. > > Where in Europe? <<<<<, Hi Seth, Beware dealing with this one as he'll eventually drive you crazy! And or have the LUG in such turmoil everyone will be looking to cut each others throat. Why? Because this is the infamous "Anthony of Paris!" Who last year had LUGGERS fighting between themselves while he sat back stirring the pot daily playing all innocent. In the beginning of his joining the LUG he appeared simple enough and each and all of us tried to be polite and answer his questions. But like a cancer, he gradually ate away at the list with his questions and responses until the turmoil was ending friendships, fierce arguments and accusations one unto the other. Meanwhile he was sitting happily in Paris enjoying his chain pulling and the stupidity of LUGGERS not to see through his charade, And if anyone wondered what it was like go to the archives, but becareful to have a fire extinguisher handy as your computer may flame in your face!:-) And if this isn't Anthony, then maybe good old >> mxsmanic<< may show some courtesy to the members and say hello with his real name. After all, this is a name of human list when we correspond. Doesn't that seem like a reasonable request? Folks wait for his answer, question as an answer or whatever. But don't be surprised. Oh yes and he is a Leica user... or at least that's what he said. ted Ted Grant Photography Limited www.islandnet.com/~tedgrant - ----- Original Message ----- From: <SthRosner@aol.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Thursday, June 28, 2001 5:47 AM Subject: Re: focus stiffness (was [Leica] Black Hole?) > In a message dated 6/28/01 3:01:57 AM Eastern Daylight Time, > mxsmanic@hotmail.com writes: > > << In absolute terms, it is about 1/26 of a stop, so it's not very much, but > still > more than many other lenses.>> > > I may have misunderstood. When someone says there's play or slack, I assume > that means the aperture ring moves without affecting the diaphragm. > > <<But the lens still has to be disassembled, doesn't it?>> > > Not necessarily. And even if there needs to be some disassembly, the lens > cell itself may be able to be left intact, i.e. the problem may be > correctible without touching any lens elements or their mounts. > > <<It's like an acoustic piano: Whenever you tune it, the tuning pins loosen > a > little bit. No matter how careful you are, no matter how good you are, you > can't avoid damaging (wearing) the pins and their block down a bit with every > tuning. And with a lens, every time you undo a screw or force a ring off a > pressure mount or whatever, something wears down a bit, and it will never be > quite the same again.>> > > I studied piano for most of my youth. There is a great deal of torque applied > to piano pins and so it is technically true that each time you tune a piano, > there is some wear on the pin. It is however infinitesmal and requires a > great deal of fiddling (forgive the pun) with the pins to have any effect at > all. So you are technically correct in saying that there's some wear, but in > the real world, fuhgetaboutit. It's a bit like saying that there's some wear > each time you press the shutter release. True, but so what? > > In any event, with lenses there is no equivalent torque, tension or pressure > on screws or retaining rings. What little resistance or load is required to > maintain an apereture ring in its click-stop or return an SLR diaphragm to > its full-open position is supplied by springs or clips whose force is > carefully calculated to supply only the tension needed for the job. > > I've been photographing with Leica equipment for over 50 years. In that time, > I've needed very little servicing but that which I've had, returned my > equipment to me in like-new mechanical and optical condition; and I mean > like-new. Properly used and cared for, your Leica camera(s) and lenses will > be usable by your grandchildren > and, if you're as old as I am, by your great grandchildren. What's the number > again? Leica shutters are crafted to be able to be used through 400,000 > cycles before requiring service? Some incredible number. > Best, Seth LaK 9 >