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02-08-2016, 02:48 PM - 7 Likes   #1
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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
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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
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The results of your test clearly show the increase in IQ that PS can provide.
Well done, and thanks for posting your results.

02-08-2016, 03:40 PM   #4
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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
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I am surprised at the difference! Thanks for the test!
02-08-2016, 04:49 PM   #6
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Wow that is quite a difference!!
02-08-2016, 04:53 PM   #7
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yep, I can tell the difference. Thanks for the test
02-08-2016, 05:13 PM   #8
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Great example!

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02-08-2016, 05:35 PM   #9
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Very interesting , it show the potential for non moving object.
02-08-2016, 06:23 PM   #10
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That's awesome. Pentax should buy those from you. Their examples weren't as good.
02-08-2016, 06:40 PM   #11
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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
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Man, I'd love to get a camera that can do this!
02-08-2016, 08:36 PM   #13
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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
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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
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Great comparison. Thanks for posting.

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