Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-15-2011, 06:09 AM   #1
New Member
helmut's Avatar

Join Date: May 2011
Location: Vienna / Europe
Photos: Gallery
Posts: 3
Kit lens, but no AF

I have recently purchased a Pentax K-7 plus 2 kit lenses, the SMC-DA 18-55, the SMC-DA 50-200 from e-Bay. Whilst the 50-200 works perfectly fine, with the short zoom 18-55 the camera asks for the focal length and AF is not available. It would seem that the K-7 does not recognise the lens and therefore (?) does not engage the slotted drive mechanism for AF.
As the aperture is set correctly and the lens does have a focussing ring, this does not really bother me. However, without a Katz-Eye (or whatever) gadget, focussing through the viewfinder is a bit awkward.
Is there a simple "repair" possible? I have carefully cleaned the contacts with alcohol and checked that the AF screw is not stuck, but to no avail. The lens should still be covered by warranty, so I could take it to a local Pentax retailer (there IS one in Vienna / Austria).
Thank you

08-15-2011, 06:20 AM   #2
Senior Member
mannesty's Avatar

Join Date: Mar 2008
Location: Totana - Murcia (Spain)
Posts: 127
I think you've probably answered your own question. If it's in warranty, take it to a dealer because it clearly is not working as it should. You might even get lucky, and they might just replace the faulty item, which I think is probably the lens.
08-15-2011, 06:23 AM   #3
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,484
When your focus selector is set to one of the AF modes (AF-C or AF-S) the screw drive should engage whether the camera recognizes the lens or not. It may not turn but the mechanical connection should still be there. If you've cleaned the contacts, the 50-200 works, and you're certain the 18-55 is completely locked on, I would tend to blame the lens. You say there is a vendor in your area so I would take the camera and the lens and see what they say. You could also try a few Other AF lenses while you are there to verify further, it is not the camera. Did you buy this outfit New or Used?

08-15-2011, 06:24 AM   #4
Pentaxian




Join Date: May 2010
Photos: Albums
Posts: 652
QuoteOriginally posted by helmut Quote
the camera asks for the focal length and AF is not available.
Cleaning the electric contacts on the lens might cure the problem.

08-15-2011, 08:33 AM   #5
Senior Member
mannesty's Avatar

Join Date: Mar 2008
Location: Totana - Murcia (Spain)
Posts: 127
QuoteOriginally posted by ultraviolet Quote
Cleaning the electric contacts on the lens might cure the problem.
You obviously missed the "I have carefully cleaned the contacts with alcohol " part of the original post.
08-15-2011, 08:37 AM   #6
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,264
The problem you describe is usually caused either by the lens not being fully mounted, or by dirty or faulty contacts, or by internal factors (bad circuitry or whatever). Since you've dealt with the external possibilities, it's likely the problem is within the lens. Send it back.

Last edited by RioRico; 08-15-2011 at 10:02 AM.
08-15-2011, 08:51 AM   #7
Giveaway winner!
MysteryOnion's Avatar

Join Date: Dec 2007
Location: beantown
Photos: Albums
Posts: 933
Under warranty... yes, take it in. Some AF clutches may not be attached right and will require the reattach and thread-lock of vital screws. Better to take it in for a look than to have screws possibly banging around inside and causing more damage. Please let us know of the results, good luck.
08-15-2011, 09:06 AM   #8
New Member
helmut's Avatar

Join Date: May 2011
Location: Vienna / Europe
Photos: Gallery
Posts: 3
Original Poster
Thank you

Thank you for the replies.
I will take the camera plus lens(es) to the local Pentax rep for a diagnosis, a therapy and (possibly) for a lens transplant.
Greetings from Vienna.

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, k-7, kit, lens, pentax, pentax help, smc-da
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Buying a K5 - but with 18-135mm lens kit? Or an 18-55 + 50-200mm lens kit? robinfaz Pentax K-5 12 06-04-2012 01:44 PM
For Sale - Sold: Pentax K-r, 18-55mm kit, 50-200mm kit, Tamron 90mm f/2.8 1:1 Macro lens (CONUS PastorOfMuppets Sold Items 3 04-02-2011 07:31 PM
k-x lens , kit 18-55mm f3.5-5.6 AL , what 50mm f1.4 can do over kit lens? crossing Troubleshooting and Beginner Help 19 01-15-2010 03:23 PM
Nature This is what a kit lens can do (K20D+kit) vulcanman Photo Critique 8 12-31-2009 06:52 PM
For Sale - Sold: WTT Pentax 18-55 AL II kit lens for 18-55 AL kit lens + money wallyb Sold Items 2 11-11-2009 02:26 PM



All times are GMT -7. The time now is 07:20 AM. | 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