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10/10/2005 10:49:22 AM · #1 |
Looking for some advice from the gurus here!
Was shooting a concert past friday, too many ppl at the place.
Was getting ready to swap lenses (was using the 70-200 2.8, and was going to put in the 50mm). I had the lens hood on and the front cap, was also using an UV filter, when some a$$hole pushed me, and I hit a wall with the lens.
The results: the filter got smashed, and the thread got bent. It's now stuck on the mount in the lens.
My question:
Can it be fixed somehow?
The hood can go in an out, although it's now a bit hard to mount it on the lens!
Here's a shot of the damage:
any thoughts?
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10/10/2005 10:53:48 AM · #2 |
EEEwch! Nasty! Can you not grip it with some pliers and turn it with the thread to remove it or is it stuck on there very tight?
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10/10/2005 10:56:26 AM · #3 |
WARNING!
If you try my suggestion, you may well end up destroying the lense completely.
Terribly sorry to see that damage...
I am unsure exactly how you could go about easily fixing that at the moment. All I can suggest would be to pick up a Dremel and become quite skilled in its use.
Then, you can grind away the ring of metal that is part of the filter and hopefully be able to squeeze together the metal band slightly to be able to lift it off the lense. You will need to break and remove the filter from its housing before you work on the ring/housing of the filter.
After that, you might be forced to grind down some of the threads that are most likely bent and twisted up on the lense so that you can put another filter on in the future.
Other then that, I can really think of no other method of removing that filter that wouldn't require squeezing the lense body into a vice and that trying to wrench off the filter with pliers.
WARNING!
If you try my suggestion, you may well end up destroying the lense completely. |
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10/10/2005 10:57:29 AM · #4 |
Originally posted by Makka:
EEEwch! Nasty! Can you not grip it with some pliers and turn it with the thread to remove it or is it stuck on there very tight? |
It's stuck there, can't unscrew it!
Imagine my face when it happened: this lens is under my posesion for only 2 weeks hehehe! Cool isn't it!?
It works perfectly, auto focus is ok, no back focus or any other damage whatsoever (so far). Neither is the front element scratched!
I'm taking it for service today. Just need to find out if I'll need to ship it to sigma (outside of brazil) or if there's any reliable place around to do the service!
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10/10/2005 10:59:13 AM · #5 |
Originally posted by Nelzie:
WARNING!
If you try my suggestion, you may well end up destroying the lense completely.
Terribly sorry to see that damage...
I am unsure exactly how you could go about easily fixing that at the moment. All I can suggest would be to pick up a Dremel and become quite skilled in its use.
Then, you can grind away the ring of metal that is part of the filter and hopefully be able to squeeze together the metal band slightly to be able to lift it off the lense. You will need to break and remove the filter from its housing before you work on the ring/housing of the filter.
After that, you might be forced to grind down some of the threads that are most likely bent and twisted up on the lense so that you can put another filter on in the future.
Other then that, I can really think of no other method of removing that filter that wouldn't require squeezing the lense body into a vice and that trying to wrench off the filter with pliers.
WARNING!
If you try my suggestion, you may well end up destroying the lense completely. |
Thought of something like that!
But as a photographer, I'm not very good with this sort of tools LoL.
I'll take it to service, and let a professional work on it!
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10/10/2005 11:01:00 AM · #6 |
| One way to try and remove stuck filters is to place it filter-side down on one of those non-slip grips pads you use to open jar lids. Grabs the lens body, push down and twist counter-clockwise. This works well when a filter is on too tight, and squeezing it with your hands to grasp it securely deforms it enough just slightly which prevents it from easily being unscrewed... not sure if it will help in this situation or not, but thought I'd mention it. |
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10/10/2005 11:04:10 AM · #7 |
Originally posted by EddyG:
One way to try and remove stuck filters is to place it filter-side down on one of those non-slip grips pads you use to open jar lids. Grabs the lens body, push down and twist counter-clockwise. This works well when a filter is on too tight, and squeezing it with your hands to grasp it securely deforms it enough just slightly which prevents it from easily being unscrewed... not sure if it will help in this situation or not, but thought I'd mention it. |
It's an idea, but I don't have such a pad to do that!
My biggest concer is, will I ever be able to use filters on it again!?
the lens hood can go in and out, but, it now offers a little resistance on mounting it. I assume that the lens barrel got bent as well. Sh*t.
Not feeling good LoL
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10/10/2005 11:12:47 AM · #8 |
You know, I've got this exact problem. A couple days ago I had be camera in the bag with a cheap shoulder strap I just bought, and the strap broke and the camera hit the marble floor. The lens cap wasnt on, so even though the bag the filter smashed. I pulled out all the glass off but the filter is stuck, looks almost exactly like yours becasue its dented in on one side. The lens I had was a 28-135 IS, and it's still fine, I'd doubt that theres any serious damage to the lens other than something cosmetic.
As for what to do, I was thinking about trying to cut away some of it with wirecutters, although I'm not going to be doing anything with it until December when I return from China. I think the upside down jar unscrewer idea sounds good too. Anyways, when you get it figured out let me know what you end up doing will you? I'll put this thread to watch. Don't worry too much about it!  |
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10/10/2005 11:16:30 AM · #9 |
this happened to me one week ago. skylight filter on my mamiya MF camera 90mm lens. Here are the steps I took:
1. get a flat file, and file down one side of the filter. you want to create a notch in the filter that goes all the way to the end of the metal lens threads. leave the filter glass in till the very last minute, if possible (if its still in). if the filter glass is still in, you can carefully work normally. if not, turn the lens upside down and work that way.
2. once you have filed that notch, i would suggest doing another one on the other side. i did't,but prolly should have.
3. turn lens upside down, with nasa-type care, remove filter glass by any means possible without hurting lens. i used a short screwdriver.
4. but the lens in a vise, upside down, so the vise grips the filter and ONLY the filter. tighten gently, do not over tighten, just enough to start fatiguing the metal threads of the filter ring. took about 3 times of this before the ring collapsed, allowing me to remove it.
you may see the end of your lens barrel flex a little. this is ok, to a point. if your being gentle, your working the metal within its limits. after i was done, i was able to simply screw another filter in as if nothing happened.
proceed at your own risk, but most importantly, don't let metal shavings and glass rain down on ur glass. in any situation that could happen, work upside down. good luck! |
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10/10/2005 11:21:09 AM · #10 |
Freeze the lens for an hour or so. There's a very good chance the filter ring will contract enough to be twisted off.
Robt.
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10/10/2005 11:24:23 AM · #11 |
This is a nasty problem you got Scuds. I dropped a lens a few months ago so that the inner mount was damaged. I took it to a certified Canon repair shop and they replaced it with a new one. The cost was about $100. You might consider asking how much a repair would cost before trying some stunts at home that might do more damage.
I have a different problem with my Canon 24-70 2,8L lens. When using a circular polarizing filter in cold weather the filter almost always gets stuck. There is no way of getting rid of it which can be frustrating if I want to get rid of the filter or use it on another lens. When the lens has been brought inside to normal temperature there is no problem taking the filter off. Has anyone got a solution to this problem?
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10/10/2005 11:24:58 AM · #12 |
Holy smokes! I think there are some things you can try before busting out the power tools. There is such a thing as a filter wrench designed for just such an occurrence.
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10/10/2005 11:36:09 AM · #13 |
Originally posted by yardboy:
this happened to me one week ago. skylight filter on my mamiya MF camera 90mm lens. Here are the steps I took:
1. get a flat file, and file down one side of the filter. you want to create a notch in the filter that goes all the way to the end of the metal lens threads. leave the filter glass in till the very last minute, if possible (if its still in). if the filter glass is still in, you can carefully work normally. if not, turn the lens upside down and work that way.
2. once you have filed that notch, i would suggest doing another one on the other side. i did't,but prolly should have.
3. turn lens upside down, with nasa-type care, remove filter glass by any means possible without hurting lens. i used a short screwdriver.
4. but the lens in a vise, upside down, so the vise grips the filter and ONLY the filter. tighten gently, do not over tighten, just enough to start fatiguing the metal threads of the filter ring. took about 3 times of this before the ring collapsed, allowing me to remove it.
you may see the end of your lens barrel flex a little. this is ok, to a point. if your being gentle, your working the metal within its limits. after i was done, i was able to simply screw another filter in as if nothing happened.
proceed at your own risk, but most importantly, don't let metal shavings and glass rain down on ur glass. in any situation that could happen, work upside down. good luck! |
Ain't got no tools at home, and I most definatelly won't be touching that myself! There's even some dust from the glass of the filter on it, I'm afraid of trying to clean it with and scratching the front element!
But well....at least the lens still work's fine!
It just doesn't have that "horny" feel you know, when u point that monster at ur subject and take a shot! I hate it when this kind of stuff happens to brand new stuff I buy. It's like having your brand new car hit by a guy hidding his bike hehe! Just a small dent, but it makes you dislike it!
shees
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10/10/2005 11:36:26 AM · #14 |
Originally posted by bear_music:
Freeze the lens for an hour or so. There's a very good chance the filter ring will contract enough to be twisted off.
Robt. |
are you serious!?
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10/10/2005 11:41:47 AM · #15 |
Hmmm, looks like the filter is now cross-threaded, that is, one part has been pushed in so that it is no longer in the correct threads. Trying to unscrew it will damage the threads on the lens further than they are already. It is impossible to tell whether they've been damaged enough to prevent mounting of a filter after this one is removed.
You will need to collapse the ring on this filter to remove it. It will require some gentle "surgery," probably will take someone with some mechanical skills anywhere from 15 minutes to an hour, with additional time to do remediation on the threads on the lens. I will bet that the lens can be made to accept a filter again, it's just going to take some work. I wouldn't be afraid to take on this "challenge", but I'm afraid I'm a bit far away to do any good :-(
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10/10/2005 11:45:28 AM · #16 |
Originally posted by kirbic:
Hmmm, looks like the filter is now cross-threaded, that is, one part has been pushed in so that it is no longer in the correct threads. Trying to unscrew it will damage the threads on the lens further than they are already. It is impossible to tell whether they've been damaged enough to prevent mounting of a filter after this one is removed.
You will need to collapse the ring on this filter to remove it. It will require some gentle "surgery," probably will take someone with some mechanical skills anywhere from 15 minutes to an hour, with additional time to do remediation on the threads on the lens. I will bet that the lens can be made to accept a filter again, it's just going to take some work. I wouldn't be afraid to take on this "challenge", but I'm afraid I'm a bit far away to do any good :-( |
That's exactly the thing I thought about! It's no longer at the correct thread on the mount!
Well well well.....at least the shots I took from the concert were approved and I'm being published!
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10/10/2005 11:51:20 AM · #17 |
Originally posted by scuds:
Thought of something like that!
But as a photographer, I'm not very good with this sort of tools LoL.
I'll take it to service, and let a professional work on it! |
Being a photographer is not a very good reason to be unable to do that.
If I were to follow that, as an IT Guy, it should have thus been impossible for me to replace the entire plumbing system in my house, but I did do it, removal of the old pipes and putting in the new pipes.
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10/10/2005 11:58:06 AM · #18 |
Originally posted by Nelzie:
Originally posted by scuds:
Thought of something like that!
But as a photographer, I'm not very good with this sort of tools LoL.
I'll take it to service, and let a professional work on it! |
Being a photographer is not a very good reason to be unable to do that.
If I were to follow that, as an IT Guy, it should have thus been impossible for me to replace the entire plumbing system in my house, but I did do it, removal of the old pipes and putting in the new pipes. |
Hehehe, I would replace the pipes as well. It's just that I don't have 830 dollars invested in pipes, on the past 2 weeks :-D
I'm afraid of damaging the lens even further. It works perfectly, it's just that damned filter ring stuck there!
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10/10/2005 12:11:32 PM · #19 |
| I removed a bent filter ring using pliers: first insert a piece of cardboard cut to fit in the ring to protect the lens. Then grasp the ring with the pliers to force the ring to buckle toward the center (aluminum is very soft and buckles quite easily) and lift out the defective ring. Not for the faint hearted, use this method only as a last resort. Note that if you decide to use a dremel tool or similar to cut the ring first, be sure that piece of cardboard is in place! Abrasives from the cutting wheel could ruin your lens. |
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10/10/2005 12:29:23 PM · #20 |
Adriano,
If you know a tool & die maker that you trust, or know someone who knows someone...
This type of person would be an option, they have the skills to compress & remove the filter, and also to do remediation on the threads. It may or may not be cheaper than a trip to a camera repair shop, although the camera repair shop will inevitably want to replace parts on the lens that the toolmaker might be able to fix.
Just another idea...
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10/10/2005 12:31:22 PM · #21 |
Originally posted by arngrimur:
This is a nasty problem you got Scuds. I dropped a lens a few months ago so that the inner mount was damaged. I took it to a certified Canon repair shop and they replaced it with a new one. The cost was about $100. You might consider asking how much a repair would cost before trying some stunts at home that might do more damage.
I have a different problem with my Canon 24-70 2,8L lens. When using a circular polarizing filter in cold weather the filter almost always gets stuck. There is no way of getting rid of it which can be frustrating if I want to get rid of the filter or use it on another lens. When the lens has been brought inside to normal temperature there is no problem taking the filter off. Has anyone got a solution to this problem? |
Rub a small amount of teflon lube on the threads. problem should go away.
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10/10/2005 12:33:01 PM · #22 |
I found this, but I don't feel secure to do it myself!!!
//www.kyphoto.com/classics/filterringtool.html
On my way to the repair shop!
thx guys, I'll keep u posted on it's recovery, LoL!
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10/10/2005 12:35:18 PM · #23 |
Originally posted by scuds:
Originally posted by bear_music:
Freeze the lens for an hour or so. There's a very good chance the filter ring will contract enough to be twisted off.
Robt. |
are you serious!? |
Sure. I've done it. Years ago, with a Nikon 55mm macro lens. The filter ring contracted a little more than the lens barrel, and I was able to unthread it. No harm in trying. A little freezing won't kill the lens, people use them in below-freezing temperatures all the time...
Robt.
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10/10/2005 12:41:29 PM · #24 |
All you need to do is make a slight cut through the filter edge and pop out the glass. Once the cut is through and the glass is out it should pop right out with a little effort.
I agree that trying to turn it out using any method could be bad. With it bent like that it will destroy the threads on the way out and you'll never be able to put a filter on the lens again. It needs to be cut out.
To make the cut, use a small hack saw with a good quality new blade. If possible make the cut next to a vacuum to catch all the metal flakes. Do not use a power tool here, it's too easy to slip and ruin the lens. With a small hacksaw and patience you sould be able to cut it and leave just a small scratch on the outter rim of the lens (not on the glass).
Anyone good with tools should be able to do this without damaging the lens. Take it to an auto mechanic or auto body place and tell them you'll buy them lunch. They usually like challenges like this.
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10/10/2005 03:59:13 PM · #25 |
Took it to the repair shop, the filter ring has been cut off, and it's all good!
Filters can be mounted and all. Already bought a new UV one.
Now, off to a even more carefull way of life! LoL
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