Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-25-2016, 02:21 PM   #1
Pentaxian
E-man's Avatar

Join Date: Aug 2012
Posts: 320
How can I get the sticky residue off my rubber lens grip?

So I've got this Sigma UC 70-210mm AF zoom lens and it's in great shape except the rubber grip has this sticky residue on it. It's not dirty but it just feels yucky like a three-year-old kid has been handling the lens after eating a peanut butter and jelly sandwich. I think the rubber is actually beginning to deteriorate. Is there any way to clean it off? I tried using an alcohol prep pad, since isopropyl alcohol is a reasonably good solvent that evaporates quickly and leaves no residue but that didn't seem to touch it. I really don't want to use anything that might work its way inside the lens and gum up the works. Suggestions are greatly appreciated.

08-25-2016, 02:42 PM   #2
Site Supporter
BigDave's Avatar

Join Date: Sep 2010
Location: Hudson Valley, NY
Photos: Gallery | Albums
Posts: 1,578
I would try a little Goo Gone, available everywhere. Put a bit on a cotton swab and work a small area to see if A- it cleans off the stickies (it should, nicely), B- It doesn't deteriorate the rubber grip!

Regards,
08-25-2016, 02:44 PM   #3
csa
Loyal Site Supporter
csa's Avatar

Join Date: Aug 2014
Location: Montana mountains
Posts: 8,348
I would suggest a dab of Avon Skin So Soft oil on a cotton swab; it won't harm the rubber, & I've removed sticky residue with it. Of course Avon doesn't suggest this use!
08-25-2016, 02:52 PM   #4
Site Supporter
ramseybuckeye's Avatar

Join Date: Apr 2009
Location: Elida, Ohio
Photos: Gallery | Albums
Posts: 8,419
Plus one for the Goo Gone

08-25-2016, 07:11 PM   #5
Site Supporter




Join Date: Oct 2010
Location: Melbourne
Photos: Gallery
Posts: 2,886
Limonene

I think Limonene would do it have used it for this purpose. It is also very good for removing sticky label residue from any surfaces.
08-25-2016, 07:16 PM   #6
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,612
Mild detergent in water?


Steve
08-25-2016, 08:55 PM   #7
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 9,737
I have read somewhere that a certain vintage of Sigma's just does that. It is not coming off because the rubber is deteriorating as you surmised. I suspect you would have to replace the rubber to really resolve the problem.
08-25-2016, 09:12 PM   #8
Site Supporter
Mark2100's Avatar

Join Date: Dec 2007
Location: Oklahoma
Posts: 185
I got the same lens in an auction lot the other day, with the same problem. Since it was basically a free lens, I soaked a couple of paper towels with 91% isopropyl alcohol and went to town. It turned the towels black. So about 8 soaked towels later, the black stopped coming off, and no more sticky on the lens. I was careful not to get any alcohol inside the lens, but not careful enough to not wipe off most of the ft/meter scale, which I can no longer read. A fair trade though imo. It is a sharp little lens, but seriously doubt I'll be pulling out any flash and need to know distance.

08-25-2016, 09:54 PM   #9
Site Supporter
Alex645's Avatar

Join Date: May 2015
Location: Kaneohe, HI
Photos: Albums
Posts: 1,222
The main culprit to this problem is DEET found on mosquito repellent. It dissolves the material at a molecular level. At best, a lot of ʻelbow greaseʻ with the Goo Gone mentioned by others and tons of patience. For anyone needing mosquito repellent, I highly recommend Picaridin based mosquito repellent. It is less toxic but effective enough and doesnʻt mess up plastic and rubberized surfaces.
08-25-2016, 10:20 PM   #10
Forum Member




Join Date: Oct 2015
Posts: 79
I second the use of ethanol or isopranol plus elbox grease. I have a Sigma with this "feature" back from the film days. Disgusting. Sticking glue everywhere. I got it off, however. Most probably, you cant avoid rubbing of the meter / feet scale. Since it is a pretty standard zoom in my case (not fast, not wide enough for my current taste), I dont use it anymore. Moreover, I probably wont buy Sigma ever again, although I know they changed the formula.
08-25-2016, 10:28 PM   #11
Site Supporter
Mark2100's Avatar

Join Date: Dec 2007
Location: Oklahoma
Posts: 185
Goo Gone instructions warn not to use on rubber.
08-26-2016, 03:03 AM   #12
Veteran Member




Join Date: Mar 2009
Location: Australia
Photos: Gallery | Albums
Posts: 370
Whiteboard cleaner.
08-26-2016, 07:20 AM   #13
Pentaxian
dcshooter's Avatar

Join Date: Jan 2011
Location: Washington DC
Photos: Gallery | Albums
Posts: 4,333
That is not residue on those old sigma grips. It's the grips themselves.

As you suspected, they are made of crappy rubber, which degrades over time, and they can't be "cleaned" without removing a significant portion of the rubber. Goo-gone, etc. are just going to further dissolve the rubber. The best solution would be to try to find some way to seal it - perhaps pull them off and spray them with a very thin layer of some clear plasti-dip? the other way might be to apply some talc to it, but it will make the grips lighter in appearance.
08-26-2016, 09:54 AM   #14
Senior Member




Join Date: Oct 2012
Location: weston-super-mare
Posts: 223
I have had problems with old rubber going soft and sticky, not just lens grips, but satellite decoder remotes, and the sponge rubber in measuring instrument cases. My Pentax ME super's light seals turned to sticky goo, just as well they can be replaced.
As for lens grips, a less loved donor lens with good rubber would be my fix.
08-26-2016, 02:16 PM   #15
Site Supporter
BigDave's Avatar

Join Date: Sep 2010
Location: Hudson Valley, NY
Photos: Gallery | Albums
Posts: 1,578
Another option, accessory lens grips, check out this e-bay link

Lens creep solution | eBay
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
alcohol, camera, lens, pentax help, photography, residue, rubber, rubber lens, sticky, troubleshooting
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
How can I, or can the administrator delete my account. RedSky Site Suggestions and Help 3 06-09-2016 03:11 PM
HELP I can't get my 50 off my macro teleconverter! shaolen Troubleshooting and Beginner Help 2 07-21-2012 09:20 PM
how much can i get for my k-r ? arsenal_emyrates Pentax K-r 6 04-26-2011 01:32 AM
[Afraid] Can't get my M42 screw mount lens off my K-x! tiny Pentax DSLR Discussion 11 10-28-2009 10:25 PM
How can I get good results from my K100D? zoomzoomfan Photographic Technique 42 12-01-2007 10:40 AM



All times are GMT -7. The time now is 01:35 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top