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04-06-2019, 07:06 AM - 3 Likes   #1
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Join Date: May 2016
Photos: Gallery
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[Lots of photos] Closeup examples: K-3II + DA 21 vs GR III

Quick comparison between GR III and K-3 II with HD DA 21 Limited. I'm posting more to show that the GR is pretty sharp and to give a sense of how the front/back bokeh generally looks like.

Read the paragraph at the end of this post carefully before you jump to sweeping conclusions, this is by no means a controlled test


First closer focus shots

GR III f2.8


GR III f3.2


GR III f5.6


GR III f11


K3II+DA21 f2.8
N/A

K3II+DA21 f3.2


K3II+DA21 f5.6


K3II+DA21 f11


Crops

GR III f2.8


GR III f3.2


GR III f5.6


GR III f11


K3II+DA21 f2.8
N/A

K3II+DA21 f3.2


K3II+DA21 f5.6


K3II+DA21 f11



Now focused on the oil bottle

GR III f2.8


GR III f3.2

GR III f5.6


GR III f11



K3II+DA21 f2.8
N/A

K3II+DA21 f3.2


K3II+DA21 f5.6


K3II+DA21 f11


Crops

GR III f2.8


GR III f3.2


GR III f5.6


GR III f11



K3II+DA21 f2.8
N/A

K3II+DA21 f3.2


K3II+DA21 f5.6


K3II+DA21 f11



Disclaimer: This is not a controlled test, even in a looser sense. I just tried to have some fixed settings so that it's not entirely all over the place (different subjects and random settings). There are many factors that varied: sample variations (I don't have a collection of each, and only took one exposure per setting), auto exposure and the light was changing as it was coming from a window behind me. I tried my best to get the same angle of view by moving the tripod, but of course it's not exactly the same, I think the GR was a little closer.
Please, don't use this to draw conclusions on absolute sharpness, and or about "how blurry the background is." I didn't exactly control the distance between the camera and the scene, and at this close range even a a couple cm make a bigger difference than half a stop in aperture.

Common setup: 2 second timer, tripod, iso 100, processed with default settings in darktable in an attempt to avoid differences from in-camera jpeg settings, auto exposure and auto white balance
Pinpoint af for the gr, live view af for the k-3 ii and manual tweaking if it was slightly off.


Last edited by aaacb; 04-06-2019 at 08:15 AM.
04-08-2019, 01:59 PM   #2
Pentaxian




Join Date: May 2015
Posts: 736
Nice test. Move the jar to the edge of the frame for even more data!
04-10-2019, 05:08 AM   #3
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Location: Quebec city, Canada
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Posts: 7,143
Pretty interesting comparison! I look forward to testing the GR III myself
04-10-2019, 06:25 AM   #4
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All in all, the GRIII is pretty equivalent to the K3ii and DA21 and in some shots actually looks better. For sharpness, it might even be within margin of error in focusing. The bokeh also looks fairly similar. It would be interesting to see how each combination deals with spectral highlights - there are literal bubble machines in this focal range for example. Also, I wonder what both pairs would look like for the GRIII's usual case - street photography at a greater distance than these closeups.

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