Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-25-2012, 11:43 AM   #1
New Member




Join Date: Jan 2012
Location: Aztec, NM
Photos: Gallery
Posts: 9
Lens problem

I have an 8 yr old *ist DS with the original SMC DA 18-55mm lens. The lens stopped auto focusing this morning. It tries, but will not "lock in". I also have another lens that "locks" fine. Is it the lens motor on my 18-55 that is shot or what??

01-25-2012, 12:30 PM   #2
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,314
there is no motor in the lens.

the *istD uses exclusively screw drive, check that the screw drive is engaged into the body. you can do this by applying slight pressure on the focusing ring, and at some point it will try to turn the focus motor, if the ring turns freely the coupling is not engaged,

i have had a couple of lenses that were a little inconsistent in engaging the focusing drive, but normally this is when new not old
01-25-2012, 01:02 PM   #3
New Member




Join Date: Jan 2012
Location: Aztec, NM
Photos: Gallery
Posts: 9
Original Poster
Lens problem

Thanks Lowell,
I turned the focusing ring from side to sie. At one end I heard a slight click and the auto focus now works. Appearently it wasn't engaged?
Bill
01-25-2012, 01:06 PM   #4
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,679
Likely the issue. It might have been the slightest of malalignment physically between the camera's screwdriver mechanism and the lens attachment.

01-25-2012, 01:53 PM   #5
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,314
QuoteOriginally posted by mrbill6771 Quote
Thanks Lowell,
I turned the focusing ring from side to sie. At one end I heard a slight click and the auto focus now works. Appearently it wasn't engaged?
Bill
glad to help.

this issue confused the hell out of me when I was switching between my PZ-1 and *istD. I think the cameras were leaving the screw drive at different angles.
01-25-2012, 01:56 PM   #6
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 40,977
Sometimes you have to wiggle the focusing ring to get the shafts to align. I guess I've been doing it sub-counsciously, but now that I think about it, the AF won't work if you don't do it.
01-25-2012, 02:00 PM   #7
New Member




Join Date: Jan 2012
Location: Aztec, NM
Photos: Gallery
Posts: 9
Original Poster
Lens problem

Thanks, everyone!! You guys have been a great help. One more little nitty to add to the bag of tricks. And this one wasn't expensive!!!
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!
lens, pentax help
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
lens problem Lynne Visitors' Center 3 11-09-2011 05:38 PM
odd front focus problem with kit lens and Tamron 18 - 250mm lens jlaubza Pentax DSLR Discussion 12 10-30-2011 09:42 AM
Help with Lens Problem AutoEccentric Pentax SLR Lens Discussion 23 08-14-2010 10:24 PM
Problem with automatic lens tfischer Troubleshooting and Beginner Help 10 03-25-2010 05:18 PM
Problem with K100D and M lens basso4735 Pentax DSLR Discussion 5 01-29-2010 01:05 PM



All times are GMT -7. The time now is 07:53 PM. | 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