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Photo Forum / Film Photography / Darkroom / April 2005cut off retaining ring?
I bought a better lens, but I can't for the life of me get the retaining ring off of my hold lens. I have a nice spanner wrench and have put oodles of force into the ring, but either I don't have the strength or the wrench slips. I'm about to cut the ring off with a dremel tool. Its likely I'll damage the threads of my old lens. Any other ideas before I further strip the slots on the retaining ring? On 4/8/2005 9:03 PM PGG spake thus: > I bought a better lens, but I can't for the life of me get the retaining > ring off of my hold lens. I have a nice spanner wrench and have put [quoted text clipped - 4 lines] > the threads of my old lens. Any other ideas before I further strip the > slots on the retaining ring? No! Not the dreaded Dremel! Oh, god no! Try a couple drops of penetrating oil or solvent, *very* carefully applied betwixt ring and collar, say with a needle. You could try alcohol, acetone, lighter fluid, stuff like that.  Signature"I know I will go to hell, because I pardoned Richard Nixon." - Former President Gerald Ford to his golf partners, as related by the late Hunter S. Thompson >I bought a better lens, but I can't for the life of me get the retaining >ring off of my hold lens. I have a nice spanner wrench and have put [quoted text clipped - 4 lines] >the threads of my old lens. Any other ideas before I further strip the >slots on the retaining ring? Now don't everybody freak....if PGG is careful and thinks about it a bit, this should work... Use a soldering iron or a soldering gun to warm up the ring (this is assuming that you can touch the ring only with the heat element and not touch the body of the lens). The hotter the gun you have the better as it will heat the ring more quickly without the heat dissipating into the body of the lens. The heat should cause the ring to expand and hopefully it will loosen enough to unscrew. I would think (but don't know, so please correct me) that unless the shutter or diaphragm blades are plastic or rubber, that you can apply a fair bit of heat without damaging anything. By a "fair bit of heat" I mean enough that you can still hold the assembly in your hand, but can't touch the ring. cheers Signatureregards from :: John Bartley 43 Norway Spruce Street Stittsville, Ontario Canada, K2S1P5 ( If you slow down it takes longer - does that apply to life also?) Ever see a lens with a plastic barrel? -- darkroommike ---------- > >I bought a better lens, but I can't for the life of me get the retaining > >ring off of my hold lens. I have a nice spanner wrench and have put [quoted text clipped - 35 lines] > ( If you slow down it takes longer > - does that apply to life also?) >Ever see a lens with a plastic barrel? > >-- >darkroommike Nope - never have Mike. Good thing to know about though, thank you Signatureregards from :: John Bartley 43 Norway Spruce Street Stittsville, Ontario Canada, K2S1P5 ( If you slow down it takes longer - does that apply to life also?) PGG wrote: > I bought a better lens, but I can't for the life of me get the retaining > ring off of my hold lens. I have a nice spanner wrench and have put > oodles of force into the ring, but either I don't have the strength or the > wrench slips. You may need to refinish the slots for the spanner wrench. If your spanner has conical/round points it may be easier to drill 2 small holes in the ring. A sharp chisel can be used to cut the notch shoulders square - a slight undercut is not a bad idea. My method: 1) A few drops of WD-40 in the threads 2) Let it sit for a day or two 3) Put the lensboard in a vice, clamped between wood pieces 4) With a small sharp cold chisel or sharpened screwdriver and a hammer gently try to 'tap' the ring off using the spanner notches. 5) Try the spanner wrench Repeat 1-5 until the ring comes off. The reason for the hammer taps is to send a shock that will loosen the threads for a few milliseconds so the WD-40 can find its way into the contact area between the ring threads and the barrel threads. When the WD-40 has completely penetrated the ring will come off easily. "Liquid Wrench" ("Liquid Plumber"?) works better but stinks to high heaven and gets all over everything, great on pipes, though. SignatureNicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ ... >3) Put the lensboard in a vice, ... This has been my life-long problem - the vice of too many lenses ... ("Liquid Plumber"?) ... I believe liquid plumber is a bottle of dilute hydrochloric (or some such) acid. Is liquid wrench (liquid wench, as the old grade eight machine shop kids used to say ...) an acid or a thin oil that will, um, penetrate? Anyway, always try WD-40 before calling the locksmith. It will not cause dust to stick, so it will not gum up a lock. This has been a rather low-photo-density post, sorry ... regards, --le Signature________________________________ Lloyd Erlick Portraits, Toronto. voice: 416-686-0326 email: portrait@heylloyd.com net: www.heylloyd.com ________________________________ On 4/16/2005 11:21 AM Lloyd Erlick spake thus: > I believe liquid plumber is a bottle of dilute hydrochloric (or some > such) acid. Is liquid wrench (liquid wench, as the old grade eight > machine shop kids used to say ...) an acid or a thin oil that will, > um, penetrate? The latter. Who thought it was acid? It's just a penetrating (i.e., light) petroleum product. Liquid Wench? Reminds me of the only joke I ever made up: Q: What did Jack the Ripper say when he was working on his car? A: "Hand me that wench!" > Anyway, always try WD-40 before calling the locksmith. It will not > cause dust to stick, so it will not gum up a lock. Better to use powdered graphite in locks; doesn't leave any gummy residue behind (which even WD-40 does). Signature"I know I will go to hell, because I pardoned Richard Nixon." - Former President Gerald Ford to his golf partners, as related by the late Hunter S. Thompson > Better to use powdered graphite in locks; doesn't leave any gummy residue > behind (which even WD-40 does). WD-40 might loosen and partially dissolve crap that is in there, but it certainly has no such residue of its own. > Use a soldering iron or a soldering gun to warm up the ring (this is > assuming that you can touch the ring only with the heat element and not > touch the body of the lens). Would a vindaloo not work better? apologies... Signaturehttp://www.petezilla.co.uk >> Use a soldering iron or a soldering gun to warm up the ring (this is >> assuming that you can touch the ring only with the heat element and not [quoted text clipped - 3 lines] > >apologies... apr1605 from Lloyd Erlick Although many years ago I knew someone named Linda Lou (and still have the picture to prove it), this one has gone over my head. I guess my vocabulary has been too influenced by American English, but ... what is a vindaloo, please?? regards, --le Signature________________________________ Lloyd Erlick Portraits, Toronto. voice: 416-686-0326 email: portrait@heylloyd.com net: www.heylloyd.com ________________________________ >>>Use a soldering iron or a soldering gun to warm up the ring (this is >>>assuming that you can touch the ring only with the heat element and not [quoted text clipped - 10 lines] > vocabulary has been too influenced by American English, but ... what > is a vindaloo, please?? While you are at it, you might wish to read a book whose title is the name of its main character: "Ella Minnow Pea" Signature.~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key: 9A2FC99A Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 14:50:00 up 5 days, 8:05, 4 users, load average: 3.40, 3.30, 3.27 >Although many years ago I knew someone named Linda Lou (and still have >the picture to prove it), this one has gone over my head. I guess my >vocabulary has been too influenced by American English, but ... what >is a vindaloo, please?? An outrageously hot curry ... >>Although many years ago I knew someone named Linda Lou (and still have >>the picture to prove it), this one has gone over my head. I guess my >>vocabulary has been too influenced by American English, but ... what >>is a vindaloo, please?? >An outrageously hot curry ... apr1705 from Lloyd Erlick, Aha. I see. Well, in that case, Linda Lou would have done the job, too. In 1974, at least. regards, --le Signature________________________________ Lloyd Erlick Portraits, Toronto. voice: 416-686-0326 email: portrait@heylloyd.com net: www.heylloyd.com ________________________________ On 4/16/2005 11:26 AM Lloyd Erlick spake thus: > Although many years ago I knew someone named Linda Lou (and still have > the picture to prove it), this one has gone over my head. I guess my > vocabulary has been too influenced by American English, but ... what > is a vindaloo, please?? Not "a" vindaloo. Here you go: http://en.wikipedia.org/wiki/Vindaloo Signature"I know I will go to hell, because I pardoned Richard Nixon." - Former President Gerald Ford to his golf partners, as related by the late Hunter S. Thompson > I bought a better lens, but I can't for the life of me get the retaining > ring off of my hold lens. I have a nice spanner wrench and have put [quoted text clipped - 4 lines] > the threads of my old lens. Any other ideas before I further strip the > slots on the retaining ring? Can you figure out what the problem is first? Is it that the ring will not move on the threads? Or is it that the ring rubs on the lensboard? Because different problems call for different solutions. The spanner wrench should not slip. Is it the wrong size? Is it poorly made? Signature.~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key: 9A2FC99A Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 07:50:00 up 14 days, 21:07, 3 users, load average: 4.36, 4.31, 4.20 >> I bought a better lens, but I can't for the life of me get the retaining >> ring off of my hold lens. I have a nice spanner wrench and have put [quoted text clipped - 9 lines] > Is it that the ring will not move on the threads? > Or is it that the ring rubs on the lensboard? My guess is that the ring is stuck in the threads somehow > Because different problems call for different solutions. > > The spanner wrench should not slip. Is it the wrong size? Is it poorly made? No, it is adjustable and is nicely made. It slips because the shaw force I am applying (I've put everything I've got into it) eventually sheers off some of the slot metal. >I bought a better lens, but I can't for the life of me get the retaining > ring off of my hold lens[...] John Bartley's tip is right-on but if it still won't move then proceed with the cutting wheel but like this - of course, first protect the rear lens; flying cutting dust is murder. Cut using the small wheel, not the larger one. You do not have to cut all the way through the ring! 70% of the way will often do it. When you turn it with the spanning wrench the torque will deform it just enough to turn on the threads. You might also be able to drill some very small holes in the ring, then the ring will break when you apply force, BTW have you considered just buying a new lensboard and ring for the new lens and selling the old lens on eBay as a mounted enlarger lens? -- darkroommike ---------- > >I bought a better lens, but I can't for the life of me get the retaining > > ring off of my hold lens[...] [quoted text clipped - 5 lines] > will often do it. When you turn it with the spanning wrench the torque will > deform it just enough to turn on the threads. > You might also be able to drill some very small holes in the ring, then the > ring will break when you apply force, BTW have you considered just buying a > new lensboard and ring for the new lens and selling the old lens on eBay as > a mounted enlarger lens? It is mounted to a lens disc, which attaches to an old Omega lens cone. These are not easy to find. I'd rather trash the lens. I think it is messed up anyways. One day I was messing with a below-the-lens filter and I inadvertently unscrewed the front element of the lens (an Omegaron or something like that). All the aperture blades fell out. I manage to piece them back together and continued to make excellent prints. But I think the aperture scales are off and I can't seem to fix them. Plus I got a pristine Rodagon replacement for $22 on eBay. Can't beat that. Tried the solder iron. Tried lighter fluid. And I used a dremel tool to deepen the slots. Still wouldn't budge, so I cut the damn thing off. I chipped off the tip of my $30 spanner wrench in the process. I can care less about the lens (threads are hosed), but the wrench damage is what ticks me off! > I bought a better lens, but I can't for the life of me get the retaining > ring off of my hold lens. I have a nice spanner wrench and have put [quoted text clipped - 4 lines] > the threads of my old lens. Any other ideas before I further strip the > slots on the retaining ring? I would recomend putting pressure in the wrong direction ie as if to tighten first then loosen. Can I also sugest the use of rubber instead of the wrench. In similar situations I have used a rubber drinks coaster to tease the object loose. > I would recomend putting pressure in the wrong direction ie as if to > tighten first then loosen. > Can I also sugest the use of rubber instead of the wrench. > > In similar situations I have used a rubber drinks coaster to tease the > object loose. I tried both!! I do these things. Which lens?Plastic or metal barrel? Bob AZ The lens was an Omegaron 135mm f4.5. I cut the ring off...I plan on tossing the lens in the junk bucket. > I do these things. Which lens?Plastic or metal barrel? > Bob AZ I do these things. Which lens?Plastic or metal barrel? Bob AZ |
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