Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
03-15-2013, 06:54 AM   #31
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,924
QuoteOriginally posted by Mr Spocko Quote
That was the only acceptable way to deal with this.
Welcome to the 21st century. In case you havent noticed, that is completely standard practice. Even with much more dangerous products that actually pose a safety hazard.
Other brands do this all the time as well. Don't get me wrong, I wish every company would take complete control and offer total warranty on their products, but that is simply not a reasonable expectation in the modern day economy.

03-15-2013, 08:16 AM   #32
Senior Member

Join Date: Dec 2011
Posts: 254
I don't agree it's standard practice for all makers. Some maybe do let things slip (Nikon are plagued with AF calibration issues)
However you look at it, it's a dangerous game for any maker to play. You can lose users over this kind of thing, and Pentax don't have that many to start with
03-15-2013, 10:54 AM   #33
Site Supporter
Site Supporter
JimJohnson's Avatar

Join Date: Jan 2012
Location: Lake Superior - Michigan
Photos: Gallery
Posts: 2,277
One of the things that keeps coming to my attention is that it seems like most of the complaints about front-focus (and I have yet to hear anyone claim there is a routine back-focus issue) under low tungsten lighting seem to come from countries where the AC power uses a 50Hz cycle. AC power in both North America and Japan is based on a 60Hz cycle. Although it is undetectable to most human eyes, even filament driven lights like tungsten bulbs will rise and fall in output according to the AC cycle. Any AF system has to use a timer circuit to make comparisons in order to determine if focus is getting better or worse. While the camera's processor is far faster than the cycle of AC power, it may be possible that the AF is catching the slower 50Hz cycle just right in low light to determine that the image is in focus when in fact it is still not quite there.
03-16-2013, 11:04 PM   #34
Senior Member
CB Knipp's Avatar

Join Date: Jan 2013
Location: Sendai, Japan
Posts: 169
My K-r never had any problems with either back or front focus. It does have an AF fine adjust as well. I would have to look back in the menu, but I believe it had less possible adjustments in comparison to my K5IIs, however. The K-r has been a reliable focusing camera with all the lenses I have used on it.

04-25-2013, 02:46 AM   #35
Senior Member
dragra's Avatar

Join Date: Dec 2010
Location: Ljubljana
Photos: Albums
Posts: 238
No problems ever in real shooting situations. It was possible though to create low light testing situation to provoke FF. These testing was done because of the fuss on the forums and because I was curious where the limits of the AF-system are. These limit is far under the light levels that I would actually want to shoot. Funny thing is if you switch from PD-AF to CD-AF the FF problem disappears.

I am keeping the K-r, because I like its performance and small form factor.

  • 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, bf, camera, ff, ff or bf, k-r, kr, pentax k-r, users
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Anybody with mirror problems with K30? Focus problems. simbon4o Pentax K-30 & K-50 14 08-28-2013 10:39 PM
Any freezing problems with K30?(like those with K5) or any other problems? simbon4o Pentax K-30 & K-50 21 01-03-2013 01:54 PM
K7, K5, DA*16-50 users: Moe49 Pentax SLR Lens Discussion 8 04-03-2011 07:50 AM
K-5 users in US, where? vario Pentax K-5 4 12-05-2010 05:25 PM
Need help with exposure problems and snow photography problems, urgent please respond montezuma Photographic Technique 7 02-24-2008 05:43 PM

All times are GMT -7. The time now is 09:08 AM. | 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]