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valjo
Joined: 10 Oct 2008 Posts: 68 Location: Bulgaria
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Posted: Thu Sep 17, 2015 7:23 pm Post subject: bent filter thread |
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valjo wrote:
I bought this lens in this condition of the filter thread
How to fix this?
_________________ Canon D60
3.5/135 Jupiter 37A |
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marcusBMG
Joined: 07 Dec 2012 Posts: 1312 Location: Conwy N Wales
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Posted: Fri Sep 25, 2015 7:52 pm Post subject: |
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marcusBMG wrote:
Only fix for this that I can suggest is to drill/grind that section of thread out.
Normally filter threads are bent inwards a bit and it is possible to judiciously bend them back out again - there are some discussions on the how to here on mflenses. But this downward ding - SOOL! _________________ pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock... |
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valjo
Joined: 10 Oct 2008 Posts: 68 Location: Bulgaria
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Posted: Wed Sep 30, 2015 4:32 pm Post subject: |
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valjo wrote:
_________________ Canon D60
3.5/135 Jupiter 37A |
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Lloydy
Joined: 02 Sep 2009 Posts: 7786 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Wed Sep 30, 2015 10:57 pm Post subject: |
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Lloydy wrote:
I have machined damage like that off, there's usually enough thread to be able to loose a couple of threads. Without a lathe I would use wet and dry abrasive paper on a sheet of glass, steel or any hard flat surface and gently abrade the damage back. If the glass is close to the front edge use decoraters paper masking tape on the glass, the adhesive isn't strong enough to damage the coatings.
I have also scraped - chased a damaged thread clean and back into some kind of shape with the blade of a craft knife, the angle of the blade nearly matches the angle of the thread. This is slow, and there's the risk of the knife slipping, it's not the easiest option but it can work well.
If the thread is restored to some kind of good shape but it still requires some force to screw anything in I use a step ring and leave it in place. The go between common sizes so a 49mm lens becomes a 52mm. I've used a step ring on a badly damaged filter thread by removing the damaged portion of thread out completely, but leaving the outer shell of the lens intact, and then gluing a step ring in place, use a non hard setting glue so it can be removed if necessary. _________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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RSalles
Joined: 12 Aug 2012 Posts: 1372 Location: Brazil - RS / South
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Posted: Thu Oct 01, 2015 2:24 am Post subject: |
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RSalles wrote:
It happen to me to think about this tool:
http://www.ebay.com/itm/Neewer-Pro-DSLR-Camera-Lens-Vise-Tool-Dent-Filter-Ring-Adjustment-Symmetric-Dent-/261982710916?hash=item3cff62ec84
Maybe it can help.
Cheers,
Renato _________________ RSalles BLog: Made in The Wet
http://madeinthewet.blogspot.com.br/ |
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valjo
Joined: 10 Oct 2008 Posts: 68 Location: Bulgaria
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Posted: Thu Oct 01, 2015 4:26 am Post subject: |
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valjo wrote:
Quote: |
I have also scraped - chased a damaged thread clean and back into some kind of shape with the blade of a craft knife, the angle of the blade nearly matches the angle of the thread. This is slow, and there's the risk of the knife slipping, it's not the easiest option but it can work well. |
this was my way _________________ Canon D60
3.5/135 Jupiter 37A |
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tb_a
Joined: 26 Jan 2010 Posts: 3678 Location: Austria
Expire: 2019-08-28
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Posted: Thu Oct 01, 2015 6:36 am Post subject: |
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tb_a wrote:
Thanks for the hint. Just bought it as it's looking promising. It's also available via Amazon, though a little bit more expensive but without shipping charges (Prime).
So I will get it tomorrow.
Will report back about its usefulness. I think I have at least 3 lenses with filter thread problems. _________________ Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
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tb_a
Joined: 26 Jan 2010 Posts: 3678 Location: Austria
Expire: 2019-08-28
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Posted: Sat Oct 03, 2015 1:47 pm Post subject: |
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tb_a wrote:
The "Neewer" filter ring repair tool is very nice and handy. All of my dented filter rings have been repaired within a few minutes and are all usable for filters again.
Sorry, was too lazy to make some before and after pictures.....
BTW, the handling is absolutely foolproof. It worked for filter ring diameters from 37mm up to 55mm and even restored the damaged thread on one lens by turning the tool clockwise and backwards when tightened not too strong to still enable some movement.
Here is the specification of the tool: http://www.amazon.com/gp/product/B00J5F72AC?gwSec=1&redirect=true&ref_=s9_simh_gw_p421_d48_i1 _________________ Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
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RSalles
Joined: 12 Aug 2012 Posts: 1372 Location: Brazil - RS / South
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Posted: Sat Oct 03, 2015 4:52 pm Post subject: |
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RSalles wrote:
Great, thanks for the feedback, next month I'll try out the same model,
Cheers,
Renato _________________ RSalles BLog: Made in The Wet
http://madeinthewet.blogspot.com.br/ |
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tb_a
Joined: 26 Jan 2010 Posts: 3678 Location: Austria
Expire: 2019-08-28
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Posted: Sat Oct 03, 2015 5:06 pm Post subject: |
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tb_a wrote:
BTW, the tool is also quite helpful to disassemble the front element from the lens when it's just screwed in like e.g. the Topcor 9cm LTM lens.
I've cleaned this lens internally by using this method. So it's actually a "multi purpose" tool. _________________ Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
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Nordentro
Joined: 24 Jun 2010 Posts: 4713 Location: Lillehammer, Norway
Expire: 2015-01-29
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Posted: Sun Oct 04, 2015 12:05 am Post subject: |
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Nordentro wrote:
Nice tool!
I bought one too from china with free shipping:
http://www.ebay.com/itm/191697118381?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT _________________ Lars | Manuellfokus.no |
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