Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
01-07-2019, 09:10 AM   #31
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 5,615
Another Australian member reports having purchased a K-30/50 (I don't recall which) from the US which had/developed the aperture problem. The US vendor refunded the purchase and told him to keep the camera rather than go through the expense and trouble to return ship it. The PF member contacted CR Kennedy who told the member that the failure was a known problem and since the camera was purchased from an authorized dealer would be covered as a warranty repair. The camera was repaired.

My suggestion to @fernoh123 is to contact CR Kennedy on both the K-30 and K-70.

01-07-2019, 08:32 PM   #32
Site Supporter
Site Supporter

Join Date: Jan 2012
Location: Brisbane
Posts: 2
Thanks, @Not a Number, I think I will do that. It occurred to me that the third-party warranty was somewhat of a hindrance in my case, since I had one camera under warranty and one not. So best to check out CR Kennedy first, to get their opinion.

19 Hours Ago   #33
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 31,402
Original Poster
QuoteOriginally posted by fernoh123 Quote
I now find my K-70 is exhibiting symptoms of the same failure.
Might you elaborate on what you are seeing? Have you confirmed that aperture control is failing by checking if the lens stops down when set to remain wide open?

FWIW, this thread is in the K-70 sub-forum and is intended for reporting and documenting issues with the K-70 aperture control only. Complaints or descriptions or comments regarding the K-30/K-50 other models are off-topic and sort of muddy the waters when trying to document your report.

19 Hours Ago   #34
retired sw engineer
Loyal Site Supporter
reh321's Avatar

Join Date: Nov 2014
Location: South Bend, IN, USA
Photos: Gallery | Albums
Posts: 10,950
QuoteOriginally posted by fernoh123 Quote
After losing my K-30 to the aperture control block problem (not verified since I decided not to repair, but 99.99% certain as to cause), I now find my K-70 is exhibiting symptoms of the same failure. The only modern lens I can use (on either camera, after updating K-30 to K-50 firmware) is my Pentax-DA 55-300 ED PLM WR lens, the one with electronic aperture. In fact, using this lens probably hid from me the early signs of the failure as I rarely use other lenses now
Actually, using a KAF4 lens might speed development of what I call Dark Image Syndrome, because it doesn't use the body's Aperture Control Mechanism. Anecdotal evidence indicates that failing to use that mechanism may cause it to fail sooner {use it or lose it}


  • 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!
aperture control, cause, exposure, failure, k-70, k70, pentax k-70, reports
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bright sun, underexposed pics. Where did I get the settings wrong? lushdimple11 Troubleshooting and Beginner Help 43 11-03-2018 11:15 PM
Q1 2019 Financial Reports - Pentax still not doomed. Kunzite Pentax News and Rumors 105 10-27-2018 06:39 AM
Underexposed Photos K1000 sonygoup Pentax Film SLR Discussion 13 02-24-2018 09:16 AM
Action Full Body Portraits - How Do I Avoid Underexposed Legs? reivax Photographic Technique 27 12-14-2017 10:54 PM
Underexposed viewfinder, normal LiveView iwtgbtp Pentax K-30 & K-50 4 03-10-2017 10:15 AM

All times are GMT -7. The time now is 04:55 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]