Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-15-2015, 07:37 AM   #1
Pentaxian
Jonathan Mac's Avatar

Join Date: Apr 2009
Location: Madrid, Spain
Posts: 3,920
Sigma AF 28-70/2.8 with stiff focus ring

I bought a Sigma 28-70mm f/2.8 DF autofucus lens last year and used it fine on my K200D and various film cameras.

I haven't used it for a few months and recently when I took it out of the cupboard I found the focus ring is very stiff below 0.6m (2 feet) - something seems to be rubbing internally. It wasn't like this before but hasn't been dropped or mistreated and there is no external damage.

I can manually focus (with difficulty) at this range but it's too stiff for an AF motor to handle. Can anyone suggest what might be the problem or how it might be fixed?I can't see any obvious way to open the front end of the lens.

Many thanks

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!
af, camera, focus, lens, pentax help, photography, sigma, sigma af, troubleshooting
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Sigma A 28-70/2.8 with caps & hood (manual focus) thornburg Sold Items 2 01-03-2014 07:55 AM
Sigma 28-70 f/2.8 manual focus aperture problem thornburg Pentax SLR Lens Discussion 4 10-06-2013 05:32 PM
For Sale - Sold: Tokina 28-70 ATX-AF 2.8 28-70 +Attachments Rupert Sold Items 5 08-30-2013 08:03 AM
Pentax 35mm f/2.4 -- stiff focus ring mee Pentax SLR Lens Discussion 5 08-13-2013 03:06 PM
Sigma 70-300 APO DG stiff zoom ring da_durty Pentax SLR Lens Discussion 5 10-11-2011 04:44 PM



All times are GMT -7. The time now is 01:50 AM. | See also: NikonForums.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