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07-01-2011, 10:18 PM   #1
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K-5 vs Canon 600D - Do the MP's matter?

There was a thread that caught my eye recently over at DPReview that lead to an interesting observation. At which point the OP of the thread was questioning the overall IQ of the Imaging Resource RAW samples and detail available from them. Which questions ranging from optical to MP advantages, which seemed valid given the initial IQ between both systems.

At which point, I decided to take a closer look and see if I couldn't help get to the nitty-gritty of things.

At it was at this point that I found the DxOMark specs which showed the K-5 with larger sensor surface area, larger photosites, DR color gamut etc etc.
And so, based on past experience, I set-out to put the Marks to the test.

And so to test the theory, here are my results; - (A TEST)

EXHIBIT A:



EXHIBIT B:

HINT: One of these samples is the K-5 and the other is the Canon T3i 600D. - (Both processed at 18MP).

And the objective is(of course) to figure out which one you think is which and why.

PS. the more feedback we can get on this, the better the outcome will be.


Last edited by JohnBee; 07-01-2011 at 10:28 PM.
07-01-2011, 10:22 PM   #2
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1st one is K5
07-01-2011, 10:23 PM   #3
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Kinda hoping that...

...the top one is the K-5, since that is what I own now. I'm not obsessive though.
07-01-2011, 10:26 PM   #4
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QuoteOriginally posted by Eagle_Friends Quote
1st one is K5
QuoteOriginally posted by lammie200 Quote
...the top one is the K-5, since that is what I own now. I'm not obsessive though.
Thanks for those fast responses guys!

Don't forget to say why(if you can).
The more feedback we can get the more meaningful this test will be.

07-01-2011, 10:49 PM   #5
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I think...

...when you compare the bottom left yellow swatches you can see the most glaring differences. The top one still looks like fabric. The bottom one has lost that look.
07-01-2011, 10:50 PM   #6
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The top one shows more details and more depth, perhaps due to the better DR of the K5 vs the 600D. Unless, of course, I am wrong in the first place.
07-01-2011, 11:01 PM   #7
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Top one is K-5, I think. I'm thinking what I see is greater dynamic range. But I'd only bet $1, not $50, if you know what I mean. Gimme, say, 14MP 16-bit TIFFs and I'll tell you, and bet $20. These are jpgs, so both are compressed into 8 bit pixel planes, and choosing that compression can make different renderings.
07-01-2011, 11:15 PM   #8
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K-5 is the SECOND one

07-01-2011, 11:55 PM   #9
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are you going to tell us the answer??
07-02-2011, 12:00 AM   #10
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Top one is K5 i think, because it has thread direction detail in some of the whites and darker colors, giving it the highest DR, i hope
07-02-2011, 12:16 AM   #11
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You need to frame your question better JohnBee.
What exactly is the 'theory' you are trying to test?
07-02-2011, 12:17 AM   #12
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I hope the top one is the K-5
07-02-2011, 12:19 AM   #13
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The bottom one is mushier in the colors, especially the yellow tones. Maybe it is a bit oversaturated? The different colors in the fabric are more separated in the top one. It also lacks details compared to the first one, again most noticeable in the yellow/beige colors.

Unfortunately I think the bottom one is the K5.

But then, I'm watching on a cheap laptop now so maybe I'm fooled by the display.
07-02-2011, 12:21 AM   #14
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the bottom one is more saturated, and pentax usually have a duller, more natural color "look" in RAW.
07-02-2011, 12:25 AM   #15
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If the 'theory' is that MP doesn't matter, because the extra resolution of the 18MP Canon sensor didn't always find its way into the image, especially as ISO changed, that case was closed long ago in relation to the sensor used in the Canon 550/60d/600d.

Even the 12MP K-x could demonstrate that, as displayed in some charts from photoreview.com.au I assembled a while ago:

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