Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-08-2013, 07:51 PM   #1
Veteran Member
causey's Avatar

Join Date: Feb 2009
Location: Arlington, VA
Photos: Albums
Posts: 3,758
K-30 with serious front focus: what would you do?

I got the Hunt's K-30 kit with the 18-55 WR for $500. Unfortunately, the camera front focuses pretty severely. Initially I thought the kit lens was defective, because images were unusually soft even at f8. After a few more tests I realized the apparent softness was out-of-focus blur. More tests with other lenses fully confirmed this conclusion. The max. allowed correction of -10 visibly improves the image, but it is not enough. The required global adjustment should be somewhere between -12 to -14.
Now, it appears global adjustment and individual lens adjustment are cumulative, so in principle I could make the required adjustments for (most of) my AF lenses. The most annoying aspect is that I get misleading focus confirmation when using my manual lenses...

The kit is OOS at Hunt's, so a replacement is impossible at this point. I could return it for a refund (they have a 15% restocking fee) or send it to CRIS. I'm inclined to choose the latter option, but I've heard stories of equipment coming back from CRIS with issues unresolved... Has anyone had the same kind of problem and sent his/her camera to CRIS? Did they manage to fix the camera? If so, how fast were they to fix it?

Thank you!


Last edited by causey; 07-08-2013 at 08:30 PM.
07-08-2013, 07:55 PM - 1 Like   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 41,397
QuoteOriginally posted by causey Quote
I got the Hunt's K-30 kit with the 18-55 WR for $500. Unfortunately, the camera front focuses pretty severely. Initially I thought the kit lens was defective, because images were unusually soft even at f8. After a few more tests I realized the apparent softness was out-of-focus blur. More tests with other lenses fully confirmed this conclusion. The max. allowed correction of -10 visibly improves the image, but it is not enough. The required global adjustment should be somewhere between -12 to -14.
Now, it appears global adjustment and individual lens adjustment are cumulative, so in principle I could make the required adjustments for my AF lenses. The annoying aspect is that I get misleading focus confirmation when using my manual lenses...

The kit is OOS at Hunt's, so a replacement is impossible at this point. I could return it for a refund (they have a 15% restocking fee) or send it to CRIS. I'm inclined to choose the latter option, but I've heard stories of equipment coming back from CRIS with issues unresolved... Has anyone had the same kind of problem and sent his/her camera to CRIS? Did they manage to fix the camera? If so, how fast were they to fix it?

Thank you!
AF adjustment is a fairly routine procedure. I would just send the camera in, as they should be able to fix it for you for good

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



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

07-08-2013, 08:38 PM   #3
Veteran Member
causey's Avatar

Join Date: Feb 2009
Location: Arlington, VA
Photos: Albums
Posts: 3,758
Original Poster
QuoteOriginally posted by Adam Quote
AF adjustment is a fairly routine procedure. I would just send the camera in, as they should be able to fix it for you for good
Thank you, Adam. That's encouraging enough I'm shipping my K-30 to CRIS tomorrow morning.

Last edited by causey; 07-08-2013 at 09:02 PM.
07-09-2013, 10:21 AM   #4
Veteran Member




Join Date: Mar 2007
Location: U.K.
Posts: 685
I haven't put it to the test myself, but I've heard that the global and individual AF adjustments aren't cumulative. You just get the last set value.

07-09-2013, 10:38 AM   #5
Veteran Member
causey's Avatar

Join Date: Feb 2009
Location: Arlington, VA
Photos: Albums
Posts: 3,758
Original Poster
QuoteOriginally posted by SteveB Quote
I haven't put it to the test myself, but I've heard that the global and individual AF adjustments aren't cumulative. You just get the last set value.
I'm not 100% certain, but my tests seemed to indicate they are cumulative.
08-25-2013, 09:13 AM   #6
Veteran Member




Join Date: Jun 2011
Location: Utah
Posts: 334
causey... Any luck? Has CRIS returned the camera yet, and if so, is it fixed to your satisfaction?
08-25-2013, 11:32 AM   #7
Veteran Member
causey's Avatar

Join Date: Feb 2009
Location: Arlington, VA
Photos: Albums
Posts: 3,758
Original Poster
QuoteOriginally posted by ofer4 Quote
causey... Any luck? Has CRIS returned the camera yet, and if so, is it fixed to your satisfaction?

Yes, I got it back in about two weeks: perfect AF!
08-25-2013, 12:07 PM   #8
Veteran Member




Join Date: Jun 2011
Location: Utah
Posts: 334
Great to hear...thanks.

04-13-2014, 06:11 PM   #9
New Member




Join Date: Oct 2013
Posts: 4
I seem to have the same very severe front focus problem with the k30 and my Tokina 28-70 atx pro .. Ok with the other da lens
The problem seems to be the focus confirmation off via the view finder .. The Life view seems to be very accurate

.. So should I send both lens and camera back to the customer service of Pentax ? Will they do any adjustment given it's not a lens made by Pentax ?
Any comment .?
Thanks
Yuhau
04-25-2014, 08:13 PM   #10
New Member




Join Date: Jan 2014
Location: Seattle
Posts: 15
Pentax K-50 kit lens AF calibration

I had a similar problem of soft focus with the 18-50 kit lens. After many checks, sequential photo settings at different adjustment values, test targets, and the like, I determined that my kit lens (and my older legacy lenses, except for my Tamron 100-300mm) required a setting of -5 to be satisfactorily focused. The Tamron does fine at no adjustment.
Understanding that kit zoom lenses are not a paragon of focus acuity, I must wonder if it's the camera that is not properly calibrated. That is, because my Pentax 50mm prime also does best at a -5 setting. Would you suggest that Pentax service should be involved in properly calibrating this new camera, or should I just suck it up and leave the (to me, high) calibration setting?
04-27-2014, 11:01 PM   #11
Site Supporter




Join Date: Nov 2008
Location: Singapore
Photos: Gallery
Posts: 923
You might want to send it in to have a check. Best be on the safe side.
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!
adjustment, camera, cris, focus, front, k-30, k-50, kit, lens, lenses, pentax k30, pentax k50, tests
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
What would you do? nomadkng Pentax SLR Lens Discussion 16 02-28-2013 08:50 AM
Hi/newbie posting with Qs about K5/K7 or 'what would you do with $1500'? rtpguy Pentax K-5 36 09-03-2011 04:31 AM
What would you do? Antifreez Pentax K-r 6 09-01-2011 11:26 AM
What would you do with this? Mallee Boy Post Your Photos! 26 09-15-2008 10:08 AM
What would you do if you were me with my current set up switch79 Pentax SLR Lens Discussion 3 09-06-2007 05:50 AM



All times are GMT -7. The time now is 11:22 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