Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-11-2017, 10:23 PM   #1
Pentaxian
E-man's Avatar

Join Date: Aug 2012
Posts: 644
K10D's autofocus has gone wonky

So I shot a few frames with my K10D today and noticed the autofocus was having difficulty focusing. A half-push on the shutter button makes the focus go all the way out, then the next half-push makes it go all the way in. Does it both in AF-S and AF-C. Manual focus works just fine. I tried three different lenses with the same result. The camera only has 5,700 shutter actuations. Any ideas? Thanks in advance.

12-11-2017, 10:46 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 49,904
Could be debris in the mirror box. That's the first thing I would check.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

12-12-2017, 02:30 AM   #3
Pentaxian
Fogel70's Avatar

Join Date: Sep 2009
Location: Stockholm, Sweden
Photos: Albums
Posts: 2,310
Is the viewfinder dark too? If that is the case it maybe a problem with the aperture mechanism in the camera.

I once had a problem with a spring for the lever in the camera that holds the aperture fully open on the lens.
The spring had jumped off the lever and it was easy to hook it back on. Without the spring the lens will always be fully stopped down (when aperture is controlled by camera), which makes it too dark for AF-sensor to lock focus. If you have a AF lens with aperture ring you can test if you notice any difference if you set the aperture manually with the aperture ring.

There is some more info on this problem in this thread.
1st Problem ever on my K10D from new - PentaxForums.com
12-12-2017, 08:48 AM   #4
Pentaxian
E-man's Avatar

Join Date: Aug 2012
Posts: 644
Original Poster
The viewfinder isn't dark. The lens appears to stop down normally. The photos I took yesterday focusing manually were properly exposed.

12-18-2017, 01:15 PM   #5
Pentaxian
E-man's Avatar

Join Date: Aug 2012
Posts: 644
Original Poster
I haven't figured out any real solutions to the focusing problem with this camera but I did notice something odd when I was messing with it a couple of days ago. The little red blip that comes up in the viewfinder to let you know what the camera is focusing on isn't anywhere near the center of the screen. It comes up way the heck over to the right. Weird...
12-18-2017, 01:40 PM - 1 Like   #6
Site Supporter
Site Supporter
paulh's Avatar

Join Date: Sep 2010
Location: DFW Texas/Ventura County, CA
Photos: Gallery | Albums
Posts: 24,753
QuoteOriginally posted by E-man Quote
I haven't figured out any real solutions to the focusing problem with this camera but I did notice something odd when I was messing with it a couple of days ago. The little red blip that comes up in the viewfinder to let you know what the camera is focusing on isn't anywhere near the center of the screen. It comes up way the heck over to the right. Weird...
Sounds like your AF point is off. Is your rear 4 way pad ring set to center-point focus (square with a dot in it) ? If it's set to SEL, your focus point can be anywhere you select.
12-20-2017, 12:00 PM   #7
Pentaxian
E-man's Avatar

Join Date: Aug 2012
Posts: 644
Original Poster
Paul, you're freakin' brilliant!!! That solved the problem. It was indeed set to SEL. Now it's on center-point and everything's copacetic again. And to think, I was seriously considering writing that camera off as a loss and putting it up on eBay real cheap to get rid of it. Glad I held off. Thanks, you just made my day. If it weren't such a dreary, rainy day here, I 'd take the camera out and shoot some pictures to celebrate!

Last edited by E-man; 12-20-2017 at 12:07 PM.
12-20-2017, 02:17 PM   #8
Site Supporter
Site Supporter
paulh's Avatar

Join Date: Sep 2010
Location: DFW Texas/Ventura County, CA
Photos: Gallery | Albums
Posts: 24,753
QuoteOriginally posted by E-man Quote
I was seriously considering writing that camera off as a loss and putting it up on eBay real cheap to get rid of it.
Be sure to let me know if you decide to do this! Glad things worked out.

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, camera, focus, pentax help, photography, shutter, troubleshooting
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help diagnosing a wonky K3 guinnessman Repairs and Warranty Service 1 07-31-2017 05:04 PM
K10D Autofocus Has Quit SRJax84 Troubleshooting and Beginner Help 7 05-09-2017 03:42 AM
Wonky Error DA 16-50 lens ok2day Pentax DSLR Discussion 1 09-17-2016 02:27 PM
Metering went wonky MadMathMind Troubleshooting and Beginner Help 6 04-11-2014 10:17 PM
Wonky 645 Meter Mock Pentax Medium Format 5 11-01-2012 05:46 PM



All times are GMT -7. The time now is 12:38 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