Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
10-01-2012, 03:12 PM   #1
Veteran Member
littledrawe's Avatar

Join Date: Jan 2010
Location: Red Rock
Photos: Gallery | Albums
Posts: 2,514
Sigma 10-20mm focus ring question

I recently acquired a 10-20mm f3.5 and while I was fiddling around with it last night I noticed that after putting it into manual focus the focus ring turns past the minimum focus distance and past the infinity mark when going either way. I have never had a lens that does this meaning that all my previous lenses have had a clear stopping point on both ends. Is this normal behavior for this lens?

10-01-2012, 03:18 PM   #2
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 51,519
I believe all modern sigma lenses are like this. The ring will continue turning but doing so has no effect on the focus.
10-01-2012, 03:21 PM   #3
Veteran Member
treebeard's Avatar

Join Date: Nov 2008
Location: Windham, NH
Photos: Gallery | Albums
Posts: 793
I believe that is correct. I noticed the same behavior before I sold it but after talking to a friend who has one he told me his behaved the same way. My Pentax 16-45 has a stopping point.
10-01-2012, 04:48 PM   #4
Veteran Member
littledrawe's Avatar

Join Date: Jan 2010
Location: Red Rock
Photos: Gallery | Albums
Posts: 2,514
Original Poster
Good enough! Thanks for the responses. I have been using mostly older manual focus stuff up to this point so this behavior was different for me.


  • 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!
10-20mm, focus, lens, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sigma 70-200 focus ring VisualDarkness Pentax SLR Lens Discussion 11 11-26-2011 06:22 PM
For Sale - Sold: Sigma 10-20mm F4-5.6 and Vivitar 28mm 2.8 close focus P/K mount ueda_masaki Sold Items 2 08-07-2011 09:42 AM
Question about 31mm Ltd Focus Ring Evolution Pentax SLR Lens Discussion 8 03-12-2011 01:33 PM
DA 18-250mm focus ring question enoxatnep Pentax SLR Lens Discussion 8 01-08-2011 12:37 PM
Focus ring question (DA* 50~135mm, DA*16~50mm) bingsean Pentax SLR Lens Discussion 6 03-20-2009 11:20 AM

All times are GMT -7. The time now is 07:00 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]