Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-20-2013, 06:55 AM   #1
Junior Member




Join Date: Jun 2013
Posts: 46
Technical Issue with Sigma 18-125 lens

I have been using this lens on my K20 for some time but today when I changed lenses it wont autofocus. The lens and camera are both set to autofocus but the display shows it as being on manual focus. My other lenses autofocus and the 18-125 autofocuses on my friends K20. Does anyone have a solution as this is my fav walking around lens?
Thanks Zozalot

06-20-2013, 07:21 AM   #2
Pentaxian




Join Date: Jan 2012
Location: Slovenia
Photos: Gallery
Posts: 2,174
Can you try other AF lenses? You should try to clean the contacts on your camera and lens.
06-20-2013, 08:12 AM   #3
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,402
QuoteOriginally posted by Giklab Quote
Can you try other AF lenses? You should try to clean the contacts on your camera and lens.
Particularly the interior pair of contacts that drive the SDM/HSM.
06-20-2013, 04:46 PM   #4
Junior Member




Join Date: Jun 2013
Posts: 46
Original Poster
Technical issues with Sigma 18-125

Thanks - tried cleaning the contacts but that didn't work. Is there something specific i should use to clean them? My other AF lenses work on the camera and the 18-125 works on my friends K20. We are both at a loss.

06-20-2013, 05:36 PM   #5
Site Supporter




Join Date: Jan 2011
Posts: 2,312
That's weird. Try isopropyl alcohol.
06-20-2013, 05:58 PM   #6
Junior Member




Join Date: Jun 2013
Posts: 46
Original Poster
Do I drink that ? Where do I get that from please?
06-20-2013, 06:01 PM   #7
Junior Member




Join Date: Jun 2013
Posts: 46
Original Poster
Tried cleaning those thanks. No joy. Still shows MF on the display and won't AF. Sigh.
06-21-2013, 08:33 AM   #8
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,402
QuoteOriginally posted by Zozalot Quote
Do I drink that ? Where do I get that from please?
Methyl alcohol - rubbing alcohol. The stuff that when you get it from a bootlegger you go blind.

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!
autofocus, issue with sigma, k20, lens, lenses, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax K-7 w/18-55 Kit Lens & Sigma 18-125 LegOverHead Sold Items 2 11-04-2012 11:18 PM
Pentax 18-135 or Sigma 18-125? gmachine Pentax SLR Lens Discussion 9 10-10-2012 04:52 AM
Suggestion Sigma 18-125 DC HSM reviews tsakatsaka Site Suggestions and Help 5 12-01-2011 02:32 PM
Replace Sigma 18-125 with Pentax 18-135? lawsonstone Pentax SLR Lens Discussion 5 12-04-2010 07:32 AM



All times are GMT -7. The time now is 11:16 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