Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-08-2016, 02:48 PM - 7 Likes   #1
Site Supporter
DavidOliver's Avatar

Join Date: Jan 2016
Posts: 34
My first pixel shift test: Owl

(Not a real owl, I'm afraid.)

I recently got a K-3 II so thought I'd do a pixel shift test and post it with comparison 1:1 crops in case anyone wants to see some of those. Although this pixel shifting has been around for a while it's still a new concept to me! It was also an excuse to try out the wife's photo studio box.

I used Pentax Digital Camera Utility (PDCU) 5.4 as outlined by the Pentax Forums K-3 II review here. No lens correction or other changes were applied. For the non-pixel shift shot, I used PDCU's standard sharpening mode (the fine sharpening mode wasn't helping in the same way it does with pixel shift shots and seemed to be having an undesirable effect), and applied as much of this standard sharpening as I could before angled edges got very obviously pixelly/jaggy.

The lens is the HD DA 20-40mm at 36mm focal length, F16, 1/3 sec exposure. As an aside, I also took a shot with the wife's SMC DA 35mm F2.8 Limited Macro, and my 20-40mm zoom seems to match it for detail here in this non-macro shot.

The overall shot sampled down which I include just for context, not quality:




The 1:1 crops:














I'll try using it in non-perfectly stationary scenes - I'm mostly interested in landscape photography - and see how PDCU and dcraw (modified version as discussed at this forum) deal with the bits that aren't stationary. I understand that they both attempt to use the data from one of the four RAWs in those areas which contain motion in order to avoid artefacts.

02-08-2016, 02:50 PM   #2
Pentaxian
bertwert's Avatar

Join Date: Jun 2015
Location: Golden, BC
Photos: Albums
Posts: 5,479
You can see the difference it makes in the 100% crops.

With the title my first thought was:
Pixel shift is for stationary subjects!
02-08-2016, 02:58 PM   #3
Site Supporter




Join Date: May 2015
Location: Melbourne
Posts: 313
The results of your test clearly show the increase in IQ that PS can provide.
Well done, and thanks for posting your results.

Cheers,
Terry
02-08-2016, 03:40 PM   #4
Veteran Member




Join Date: Aug 2010
Location: Houston, Texas
Posts: 759
I assume the PS is on the right? There is certainly an increase in IQ on these zoomed-in examples. I wonder at what size you'd have to print to see the difference? Thanks greatly for this work and sharing.

02-08-2016, 04:31 PM   #5
Forum Member




Join Date: Aug 2012
Location: Creston,B.C.
Posts: 55
I am surprised at the difference! Thanks for the test!
02-08-2016, 04:49 PM   #6
Pentaxian
12345's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 487
Wow that is quite a difference!!
02-08-2016, 04:53 PM   #7
Site Supporter




Join Date: Jan 2011
Posts: 2,391
yep, I can tell the difference. Thanks for the test
02-08-2016, 05:13 PM   #8
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,128
Great example!


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:

02-08-2016, 05:35 PM   #9
Pentaxian
bobmaxja's Avatar

Join Date: Mar 2010
Location: Laval, Quebec Canada
Posts: 1,736
Very interesting , it show the potential for non moving object.
02-08-2016, 06:23 PM   #10
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 25,830
That's awesome. Pentax should buy those from you. Their examples weren't as good.
02-08-2016, 06:40 PM   #11
Junior Member




Join Date: Oct 2015
Posts: 38
dcraw is terrible in comparison to PDCU in my experience. When it's truly static, both should be fine but PDCU has better detect/fix of the zipper artifacts that occur from slight motion (e.g., landscape). At least that's my experience.
02-08-2016, 08:33 PM   #12
Pentaxian
bobbotron's Avatar

Join Date: Jan 2015
Location: Ottawa, ON
Photos: Gallery
Posts: 1,900
Man, I'd love to get a camera that can do this!
02-08-2016, 08:36 PM   #13
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,256
QuoteOriginally posted by bobbotron Quote
Man, I'd love to get a camera that can do this!
You gotta get you one of these !
02-08-2016, 08:38 PM   #14
Pentaxian
bobbotron's Avatar

Join Date: Jan 2015
Location: Ottawa, ON
Photos: Gallery
Posts: 1,900
QuoteOriginally posted by jpzk Quote
You gotta get you one of these !
No gear for me for a while... but I could seriously see getting a K3II at some point. Pixel shift PLUS astrotracer? Egads.
02-08-2016, 11:39 PM   #15
Loyal Site Supporter
Kath's Avatar

Join Date: Jan 2014
Location: Portland, OR
Photos: Gallery
Posts: 700
Great comparison. Thanks for posting.
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!
crops, da, dslr, k-3, k3, lens, pdcu, pentax k-3, pixel, pixel shift, pixel shifting, pixel shifting samples, pixel shifting test, shift, shot, test
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pixel Shift Corruption? amoringello Digital Processing, Software, and Printing 19 01-28-2016 03:59 PM
pixel shift on K3 II TEST v canon 6D - PRINT marmaduke Pentax K-3 214 11-30-2015 12:41 PM
K3II: Pixel Shift First Test DDoram Pentax K-3 168 11-24-2015 10:15 AM
Pixel Shift brophyart Troubleshooting and Beginner Help 6 10-31-2015 02:53 PM
Nature My first Owl in the Wild c.a.m Photo Critique 7 12-28-2014 04:29 PM



All times are GMT -7. The time now is 09:26 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