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 > Telephoto

Telephoto Lenses with focal lengths longer than 60mm.

Reply
 
Thread Tools Display Modes
  #1  
Old 30th June 2008
HughofBardfield's Avatar
HughofBardfield HughofBardfield is offline
Full member
 
Join Date: Dec 2007
Location: Great Bardfield, Essex, UK
Posts: 730
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked 0 Times in 0 Posts
Stiff ZD 50-200mm zoom

I have an old style ZD 50-200mm which has recently developed an excessively stiff zoom action. Zooming in is fine, but zooming out back to the 50mm end requires real effort - so much that I'm concerned about the strain on the lens mount.

Has anyone else experienced a similar problem and effected a cure? I'm trying to avoid a trip to the lens doctor for cash flow reasons!
Reply With Quote
  #2  
Old 30th June 2008
Chillimonster
Guest
 
Posts: n/a
Re: Stiff ZD 50-200mm zoom

Has it suddenly become 'stiff' or has it always been like that?

I have hold of various 50-200mm's, both old and new. Some were loose, some were too loose (for me anyway) and some were too stiff.

But if it has suddenly started to become stiff, it could mean it needs that visit to the lens doctor

Chris
Reply With Quote
  #3  
Old 30th June 2008
andym's Avatar
andym andym is offline
Senior Member
 
Join Date: Nov 2007
Location: Epping Forest
Posts: 4,355
Thanks: 37
Thanked 346 Times in 258 Posts
Likes: 39
Liked 1,010 Times in 300 Posts
Re: Stiff ZD 50-200mm zoom

Hugh

I have herd of this happening when there is a problem with one of the two rubber sealing rings that go round the inner barrell.
Dont want to be the bringer of bad tidings but I think it will need to go to service.
__________________
All the best

Being left handed my brain sometimes works sdrawkcab

Andy

Lots of cameras and lenses.


My Flickr
Reply With Quote
  #4  
Old 30th June 2008
Jim Ford Jim Ford is offline
Full member
 
Join Date: Dec 2007
Location: Watford, Herts..
Posts: 8,573
Thanks: 471
Thanked 608 Times in 527 Posts
Likes: 2,756
Liked 1,684 Times in 1,084 Posts
Re: Stiff ZD 50-200mm zoom

I wonder if the weather seal is causing the binding? This would explain why it binds only with the lens zooming back in. If the rubber is dragging on the lens barrel it would tend to release its grip zooming out, but tighten zooming in.

I would use the _tiniest_ trace of silicone grease on the barrel - not even enough to leave a visible smear - to avoid picking up dirt. Maybe silicone furniture polish would be as good or even better. Again, you should only use the faintest trace.

Jim
Reply With Quote
  #5  
Old 30th June 2008
HughofBardfield's Avatar
HughofBardfield HughofBardfield is offline
Full member
 
Join Date: Dec 2007
Location: Great Bardfield, Essex, UK
Posts: 730
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked 0 Times in 0 Posts
Re: Stiff ZD 50-200mm zoom

Oh dear! Thanks for the comments. I suspected the weather seal as well.

I bought it last Summer on eBay and it has been fine until fairly recently, but it sounds like the Doctor is required... I don't fancy greasing something myself in case there's a more serious misalignment underlying the stiffness.

Colchester Camera Repair Service is my nearest centre AFAIK - anyone have experience of their work?
Reply With Quote
  #6  
Old 30th June 2008
Jim Ford Jim Ford is offline
Full member
 
Join Date: Dec 2007
Location: Watford, Herts..
Posts: 8,573
Thanks: 471
Thanked 608 Times in 527 Posts
Likes: 2,756
Liked 1,684 Times in 1,084 Posts
Re: Stiff ZD 50-200mm zoom

Quote:
Originally Posted by HughofBardfield View Post
I don't fancy greasing something myself in case there's a more serious misalignment underlying the stiffness.
What I suggested is not 'greasing' as such. The amount I'd use would be scarcely larger than a pinhead - just enough to leave the faintest trace on the barrel.

Jim
Reply With Quote
  #7  
Old 1st July 2008
HughofBardfield's Avatar
HughofBardfield HughofBardfield is offline
Full member
 
Join Date: Dec 2007
Location: Great Bardfield, Essex, UK
Posts: 730
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked 0 Times in 0 Posts
Re: Stiff ZD 50-200mm zoom

Quote:
Originally Posted by Jim Ford View Post
What I suggested is not 'greasing' as such. The amount I'd use would be scarcely larger than a pinhead - just enough to leave the faintest trace on the barrel.

Jim
Sorry Jim - I know that's what you suggested: I didn't mean to imply you'd advised applying axle grease with a spatula!

I'm just wary of applying even a minute trace of something myself in case it seeps in somewhere it shouldn't.
Reply With Quote
  #8  
Old 14th August 2008
HughofBardfield's Avatar
HughofBardfield HughofBardfield is offline
Full member
 
Join Date: Dec 2007
Location: Great Bardfield, Essex, UK
Posts: 730
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked 0 Times in 0 Posts
Re: Stiff ZD 50-200mm zoom

Quote:
Originally Posted by Jim Ford View Post
What I suggested is not 'greasing' as such. The amount I'd use would be scarcely larger than a pinhead - just enough to leave the faintest trace on the barrel.

Jim
Finally, finally plucked up the courage to try this after getting rained on at the London Triathlon on Saturday. The stiffness had come and gone, and hadn't been bad enough to ship the lens off to Oly, but came back again after getting (only mildly) damp. I also found I had some silicone spray lubricant specifically for 'o' ring seals that I'd forgotten I had (don't ask).

Tried just the very faintest trace sprayed onto a lint free cloth and wiped around the inner lens barrel. Result - transformation (so far, at least).

I bought the lens used and it was... well, filthy when it arrived. Obviously I cleaned it up thoroughly, and may have inadvertently removed the factory lubrication, or it may have simply come away with the dust I removed from the crevices!

Either way, thanks for the suggestion Jim. All being well, you've saved me an expensive service!
Reply With Quote
  #9  
Old 14th August 2008
Chillimonster
Guest
 
Posts: n/a
Re: Stiff ZD 50-200mm zoom

Excellent result
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
Lens dilemma (Sigma 10-20mm V Oly 11-22mm) & (Sigma 70-200mm V Oly 50-200mm) jchallen Lens focus 19 10th November 2008 10:20 AM
FL50-R zoom question Invicta Flash 2 21st July 2008 05:30 PM
40-200mm f2.8 FS sapper For sale or wanted small ads 0 19th May 2008 10:55 AM
For sale 14-54mm zoom Melaka For sale or wanted small ads 0 29th April 2008 08:52 AM
FS: Olympus 50-200mm Zoom lens DerekW For sale or wanted small ads 1 30th March 2008 11:21 AM


All times are GMT. The time now is 06:35 AM.


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