Olympus UK E-System User Group
Olympus UK E-System User Group

Join our unique resource for Olympus Four Thirds E-System DSLR and Pen and OM-D Micro Four Thirds photographers. Show your images via our free e-group photo gallery. Please read the e-group.uk.net forum terms and conditions before posting for the first time. Above all, welcome!


Go Back   Olympus UK E-System User Group > Cameras, lenses and system accessories > Lens focus > Converters, adapters and extension tubes

Converters, adapters and extension tubes All those lens accessories that get in between the lens and the camera.

Reply
 
Thread Tools Display Modes
  #16  
Old 13th November 2018
Ross the fiddler's Avatar
Ross the fiddler Ross the fiddler is offline
Full member
 
Join Date: Apr 2010
Location: Blue Mtns, NSW Australia
Posts: 13,662
Thanks: 2,017
Thanked 1,295 Times in 1,010 Posts
Likes: 5,208
Liked 1,919 Times in 1,069 Posts
Re: Easy lens changing

Quote:
Originally Posted by Jim Ford View Post
Araldite's great stuff for bonding thermosetting plastics, but the plasticiser used in some (most?) thermo plastics can compromise the bond.

Jim
I hate it when some home repairer uses epoxy resin to glue in a violin neck. At least it softens with heat (hairdryer) & I can remove it, but I doubt that sort of heat would soften the glue enough in that situation though, although as it warms enough it can 'creep'.
__________________
Ross
I fiddle with violins (when I'm not fiddling with a camera).
Flickr: https://www.flickr.com/photos/ross-the-fiddler/
Cameras: OM-D E-M1 & Mk II, Olympus Stylus 1, OM-D E-M5.
Lenses: M.ZD12-40mm f2.8 PRO Lens, M.ZD40-150mm f2.8 PRO Lens with MC-14, M.ZD12-50, M.ZD60 Macro, M.ZD75-300 Mk II, MMF-3, ZD14-54 II, Sigma 150mm F2.8 APO Macro DG HSM.
Flashes: FL36R X2, FL50R, FL50.
Software: Capture One Pro 10 (& Olympus Viewer 3).
Reply With Quote
  #17  
Old 14th November 2018
Jim Ford Jim Ford is offline
Full member
 
Join Date: Dec 2007
Location: Watford, Herts..
Posts: 8,073
Thanks: 432
Thanked 567 Times in 494 Posts
Likes: 2,523
Liked 1,587 Times in 1,010 Posts
Re: Easy lens changing

Quote:
Originally Posted by Ross the fiddler View Post
I hate it when some home repairer uses epoxy resin to glue in a violin neck. At least it softens with heat (hairdryer) & I can remove it, but I doubt that sort of heat would soften the glue enough in that situation though, although as it warms enough it can 'creep'.
Not sure what you're saying here, Ross. When an epoxy resin adhesive like Araldite sets, it won't soften with heat. The setting is an irreversible chemical process. I thought animal glue was still used in violins, which softens with heat and facilitates repair of the instrument.

Jim
Reply With Quote
  #18  
Old 14th November 2018
Jax Jax is offline
Full member
 
Join Date: Oct 2018
Location: UK
Posts: 706
Thanks: 110
Thanked 35 Times in 30 Posts
Likes: 332
Liked 187 Times in 125 Posts
Re: Easy lens changing

Quote:
Originally Posted by Jim Ford View Post
Not sure what you're saying here, Ross. When an epoxy resin adhesive like Araldite sets, it won't soften with heat. The setting is an irreversible chemical process. I thought animal glue was still used in violins, which softens with heat and facilitates repair of the instrument.

Jim

Sorry Jim, but that is totally incorrect information.

Araldite remains stable in temperatures up to boiling point but higher temps soften it. Hence it is useless on anything that has a high temp such as ovens, engines, electric heating elements etc. I seem to remember the melting, softening point is 200 degrees centigrade. It will possibly harden again upon cooling but the bond will probably have been compromised.

"Araldite" however is merely a brand name producing numerous epoxy resin glues. There is a high temp variant available but not usually found in DIY outlets.

Jax
Reply With Quote
  #19  
Old 14th November 2018
Jim Ford Jim Ford is offline
Full member
 
Join Date: Dec 2007
Location: Watford, Herts..
Posts: 8,073
Thanks: 432
Thanked 567 Times in 494 Posts
Likes: 2,523
Liked 1,587 Times in 1,010 Posts
Re: Easy lens changing

Quote:
Originally Posted by Jax View Post
I seem to remember the melting, softening point is 200 degrees centigrade. It will possibly harden again upon cooling but the bond will probably have been compromised.
I don't think it melts so much as degrades and breaks down, and on cooling its original properties won't be restored. Epoxy resins are thermosetting resins - they set with heat undergoing an irreversible catalytic process, although the heat can be moderate even room temperature. If I've got an item that I want to bond and it will stand low heat (say 100 C) I'll put it in a cool oven. The nice thing about using moderate heat is that the mixed resin will flow into irregularities and interstices ensuring a good bond. Also any air bubbles are dissipated.

Jim
Reply With Quote
  #20  
Old 14th November 2018
Ross the fiddler's Avatar
Ross the fiddler Ross the fiddler is offline
Full member
 
Join Date: Apr 2010
Location: Blue Mtns, NSW Australia
Posts: 13,662
Thanks: 2,017
Thanked 1,295 Times in 1,010 Posts
Likes: 5,208
Liked 1,919 Times in 1,069 Posts
Re: Easy lens changing

Quote:
Originally Posted by Jim Ford View Post
Not sure what you're saying here, Ross. When an epoxy resin adhesive like Araldite sets, it won't soften with heat. The setting is an irreversible chemical process. I thought animal glue was still used in violins, which softens with heat and facilitates repair of the instrument.

Jim
If you have anything with it spilt on, try a hair dryer on it & notice how it softens (with a knife or other sharp implement), but maybe it has been 5 minute Araldite. I can pick it off as it does, thankfully. Yes, animal glue (Russian Hide Glue) should be used, but sometimes some people have a go at doing their own repairs & later bring it to be done properly. Then it costs more as I have to undo what they've done. As I mentioned earlier, if a neck had been reglued in with Araldite then heating with a hair dryer I can eventually remove it as it softens. If it's hide glue, then after loosening the edges with a knife the neck then has to be cracked out, since the hide glue goes brittle.
__________________
Ross
I fiddle with violins (when I'm not fiddling with a camera).
Flickr: https://www.flickr.com/photos/ross-the-fiddler/
Cameras: OM-D E-M1 & Mk II, Olympus Stylus 1, OM-D E-M5.
Lenses: M.ZD12-40mm f2.8 PRO Lens, M.ZD40-150mm f2.8 PRO Lens with MC-14, M.ZD12-50, M.ZD60 Macro, M.ZD75-300 Mk II, MMF-3, ZD14-54 II, Sigma 150mm F2.8 APO Macro DG HSM.
Flashes: FL36R X2, FL50R, FL50.
Software: Capture One Pro 10 (& Olympus Viewer 3).
Reply With Quote
  #21  
Old 14th November 2018
Jim Ford Jim Ford is offline
Full member
 
Join Date: Dec 2007
Location: Watford, Herts..
Posts: 8,073
Thanks: 432
Thanked 567 Times in 494 Posts
Likes: 2,523
Liked 1,587 Times in 1,010 Posts
Re: Easy lens changing

Quote:
Originally Posted by Ross the fiddler View Post
If you have anything with it spilt on, try a hair dryer on it & notice how it softens (with a knife or other sharp implement), but maybe it has been 5 minute Araldite. I can pick it off as it does, thankfully. Yes, animal glue (Russian Hide Glue) should be used, but sometimes some people have a go at doing their own repairs & later bring it to be done properly. Then it costs more as I have to undo what they've done. As I mentioned earlier, if a neck had been reglued in with Araldite then heating with a hair dryer I can eventually remove it as it softens. If it's hide glue, then after loosening the edges with a knife the neck then has to be cracked out, since the hide glue goes brittle.
Is it possible that the amateur epoxy repair was done without removing the remains of the animal glue (I'd bet it was)? In this case it was probably the animal glue underneath that was softening, enabling the removal of the epoxy.

5 min epoxy is pretty inferior to the 14 hr stuff. 5 min epoxy never seems to set 'glass hard' like the longer curing time types.

I've used 'J B Weld' epoxy for building camping stoves. It will stand up to 290 C.

Jim
Reply With Quote
The Following User Says Thank You to Jim Ford For This Useful Post:
Ross the fiddler (14th November 2018)
  #22  
Old 23rd November 2018
Pistnbroke's Avatar
Pistnbroke Pistnbroke is offline
Full member
 
Join Date: Dec 2014
Location: UK
Posts: 188
Thanks: 28
Thanked 25 Times in 19 Posts
Likes: 20
Liked 25 Times in 18 Posts
Re: Easy lens changing

Just made a 4/3 version from two extension tubes at a cost of 9.99 looks like the Nikon one I posted at the top so I wont do another photo
__________________
Retirement cut backs.. 2 x D7200 with 18-140, Nik 10.5 mm D850 with N 28-300, Samyang 14mm Tamy 100-400 + Nikon 200-500mm
Holiday cam .... Olympus OMD M5 + 14mm Panasonic .
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Changing Times wornish General photography discussion 0 21st February 2018 10:10 PM
Changing sunrise Phill D Foto Fair 26 22nd September 2014 08:00 PM
Lens changing when out and about Ricoh Tutorials, Informative & Classic threads 22 3rd July 2014 07:00 AM
Changing system sponner For sale or wanted small ads 31 11th November 2011 09:16 AM
Changing lenses? Janet Olympus E-520 5 15th May 2011 07:14 PM


All times are GMT. The time now is 02:10 AM.


The Write Technology Ltd, 2007-2019, All rights reservedAd Management plugin by RedTyger