Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
04-01-2014, 02:44 AM   #16
New Member

Join Date: Feb 2011
Location: Seattle
Photos: Gallery
Posts: 6
Thanks. A thoughtful extension to your previous posting. I'm hoping that the very clever Pentax and Sony engineers will reach the same conclusion and not continue increasing pixel count beyond about 36Mp. I would rather see them concentrate on such things as increasing dynamic range and further reducing noise.

04-01-2014, 11:47 AM   #17
ScooterMaxi Jim's Avatar

Join Date: Jul 2009
Location: Minnesota
Posts: 1,501
Of course, not all the 16mp Pentax sensors perform equally. A big part of why the K5 had better supposed DR is that the AA was so strong it appeared to have greater shadow depth (2 bits of extra bit depth helped only very slightly by comparison). While I certainly agree from what I've seen the K3 is easily the best in terms of flat-out resolution (at some cost due to just a bit of added noise and associated loss of DR), I think the K-30/01 and K5iis all get noticeably more resolution out of the 16mp sensors than the first-gen K5. The DxO sensor/lens combo ratings bare that out - and it's a significant improvement (as is the K3 yet another step up in resolution).

Last edited by ScooterMaxi Jim; 04-01-2014 at 12:18 PM. Reason: Clarification of source of ratings
04-01-2014, 08:31 PM   #18
Loyal Site Supporter

Join Date: Jun 2009
Location: Tumbleweed, Arizona
Photos: Gallery | Albums
Posts: 5,107
Good Evening,

This is an excellent comparison. I took a slightly different approach, that is also available to everyone too. There is a web based image comparison tool located at...I also grabbed the location of the image - which is located at...I used the last stamp image set provided and loaded it into each side of the tool, then using the up/down/left/right maneuvered the image so that the K5 was on the left and the K3 was on the right. I also scaled up the the K5 side, and then moved the images together so that I could use the slider bar to observe the same area of each of the images together. Here is a full and a partial screen grab.

Using your mouse, you can "grab", the green "handle" on the bar and slide it back and forth over a section of the image, thereby being able to compare in real time the same part of the stamp from each of the camera images.

To my eye, there is a slight difference in white balance between the two images. In terms of resolution, they are both very close. I would give the K5 a very slight edge over the K3 in terms of comparing the background of the grid - sharpness and definition. The K3 appears to have just a touch of shadowing. It is really so close that I am seeing it as a toss up. Perhaps its my coke bottle glasses....

Attached Images
04-03-2014, 04:47 AM   #19
Site Supporter
Stone G.'s Avatar

Join Date: Jun 2010
Location: North Zealand, Denmark
Photos: Gallery | Albums
Posts: 1,516
Original Poster
QuoteOriginally posted by interested_observer Quote
I took a slightly different approach, that is also available to everyone too. There is a web based image comparison tool located at...Image scraper and comparator - a experiment
What an interesting tool. Many thanks for the link!


  • 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!
*ist dl, camera, detail, dslr, image, iso, k-200d, k-3, k-5, noise, pentax, pentax dslr, pentax dslr sensors, photography, pixel, quality, resolution, result, sensor, test
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Simple DSLR with my old Takumar lens Hosperantasa Pentax SLR Lens Discussion 6 07-07-2013 12:00 AM
DSLR vs SLR camera life Gary Pentax DSLR Discussion 27 02-23-2013 05:11 PM
I hope Pentax keeps going with Crop Sensors coreyhkh Pentax DSLR Discussion 76 01-02-2013 08:52 AM
Having a blast with my first DSLR DLCrow Welcomes and Introductions 4 12-07-2012 11:04 AM
Greatest Threat to DSLR Sensors mithrandir Photographic Technique 8 07-29-2010 07:17 PM

All times are GMT -7. The time now is 04:08 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]