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02-06-2008, 05:36 AM   #16
wll
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On that same web site you can get their test for the Nikon D300. Look at the doll shot at 3200 iso and compare it to the K20D 3200 iso doll shot.

Look at the color charts and notice how EXTREMELY well the K20D graduates whites to gray to black compared to the Nikon D300.

Pentax has one heck of an incredible sensor here, and once this camera gets out and we get more reports, I think Pentax will have folks talking with big smiles on their faces.


wll

02-06-2008, 06:58 AM   #17
raz
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Hi
Here are the iso tests from different cameras (hope the links work). The problem is that the D300 looks a little underexposed compared to the k20D, maybe with 1 stop and that is why I cannot say if the noise is worse or better. Also D300 has a lot more luma noise compared to K20 which has chroma noise. But it looks like K20D retains the most details.

40D Iso 1600
‹大”ƒ€ASCII.jp€‘

40D Iso 3200
‹大”ƒ€ASCII.jp€‘


D300 Iso 1600
Translated version of http://ascii.jp/elem/000/000/092/92081/img.html

D300 Iso 3200
Translated version of http://ascii.jp/elem/000/000/092/92082/img.html

D300 Iso 6400
Translated version of http://ascii.jp/elem/000/000/092/92083/img.html


K20D Iso 1600
Translated version of http://ascii.jp/elem/000/000/105/105724/img.html

K20D Iso 3200
Translated version of http://ascii.jp/elem/000/000/105/105725/img.html

K20D Iso 6400
Translated version of http://ascii.jp/elem/000/000/105/105722/img.html


A700
Iso 6400
Translated version of http://ascii.jp/elem/000/000/087/87317/img.html
02-06-2008, 07:14 AM   #18
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QuoteOriginally posted by raz Quote
Hi
Here are the iso tests from different cameras (hope the links work). The problem is that the D300 looks a little underexposed compared to the k20D, maybe with 1 stop and that is why I cannot say if the noise is worse or better. Also D300 has a lot more luma noise compared to K20 which has chroma noise. But it looks like K20D retains the most details.

40D Iso 1600
拡大画像【ASCII.jp】

40D Iso 3200
拡大画像【ASCII.jp】


D300 Iso 1600
Translated version of http://ascii.jp/elem/000/000/092/92081/img.html

D300 Iso 3200
Translated version of http://ascii.jp/elem/000/000/092/92082/img.html

D300 Iso 6400
Translated version of http://ascii.jp/elem/000/000/092/92083/img.html


K20D Iso 1600
Translated version of http://ascii.jp/elem/000/000/105/105724/img.html

K20D Iso 3200
Translated version of http://ascii.jp/elem/000/000/105/105725/img.html

K20D Iso 6400
Translated version of http://ascii.jp/elem/000/000/105/105722/img.html


A700
Iso 6400
Translated version of http://ascii.jp/elem/000/000/087/87317/img.html
The noise quality of the Nikon renders the image softer. The grain is more evident in the skin tones of the doll. I would go as far as to say that the K20D has a 2/3 to 1 1/3 stop advantage.

Ben
02-06-2008, 07:30 AM   #19
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I just downloaded the 6400 image from the K20D and ran it through Neat Image. Very impressed with the result. Sure it looses detail from the low ISO shots but very usable and the detail that is there is really quite good.

What's that old ad? "You've come a long way baby" In only a few short years.

Here's the link to the gallery with the lager size and corrected shot (645Kb vs the 9.7 Mb original):

https://www.pentaxforums.com/gallery/images/2071/1_K20D_6400_filtered_filtered2.jpg

I could have filtered it more but just gave it a single pass.


Last edited by Peter Zack; 02-06-2008 at 08:18 AM.
02-06-2008, 07:56 AM   #20
raz
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here is the result that I got with 2 NR passes from Iso 6400 (click the link for the big image)

http://raz.ro/ISO6400o_n.jpg
Attached Images
 

Last edited by raz; 02-06-2008 at 08:01 AM.
02-06-2008, 07:57 AM   #21
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There is definitely more detail in the K20D shots than any other camera at same ISO. The 40D is the closest in terms of noise, but the colour is off and amount of detail is just awful. I just shot my nightclub stuff last night with a 40D and I'm not a fan.
02-06-2008, 08:03 AM   #22
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Original Poster
QuoteOriginally posted by Peter Zack Quote
I just downloaded the 6400 image from the K20D and ran it through Neat Image. Very impressed with the result. Sure it looses detail from the low ISO shots but very usable and the detail that is there is really quite good.

What's that old ad? "You've come a long way baby" In only a few short years.

Here's the link to the gallery with the lager size and corrected shot (645Kb vs the 9.7 Mb original):

https://www.pentaxforums.com/gallery/images/2071/1_K20D_6400_filtered_sm.jpg

I could have filtered it more but just gave it a single pass.
NEVER mind, just looked at Raz's.....pattern gone......
02-06-2008, 08:21 AM   #23
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Raz, I just had a look at your version and it's much cleaner and smoother than the one I attempted. Would you mind either outlining what you are doing either here or if you don't want to hijack the thread via PM. Are you using neat image?

02-06-2008, 08:42 AM   #24
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QuoteOriginally posted by benjikan Quote
The noise quality of the Nikon renders the image softer. The grain is more evident in the skin tones of the doll. I would go as far as to say that the K20D has a 2/3 to 1 1/3 stop advantage.

Ben
Well, the D300 is underexposed 1 1/3 stop from the K20 so noisewise, they should be about the same if they had the same exposure (good job on the metering side by K20).

Furthermore, we don't know what were the NR settings on both cameras. The D300 defaults to "Normal" while it was my understanding (?) that the K20 defaulted to "off"... could mean a big difference and explain in part why the K20 seems to come in an easy 1st place on details and overall sharpness.

If true, and taking into account 1/that noise could be reduced even further by exposing almost 1 stop more to the right and 2/ that for a given print size the "grain" would be 15% finer than D300 and 25% than 40D, I see lots of reasons to indulge some moderate celebrations in honour of the K20D!

Let's put some champain bottles in a cold place for the time it will be tested against competition in a more controlled environment... and even more for the time we'll be able to use this baby!!
02-06-2008, 09:18 AM   #25
raz
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QuoteOriginally posted by Peter Zack Quote
Raz, I just had a look at your version and it's much cleaner and smoother than the one I attempted. Would you mind either outlining what you are doing either here or if you don't want to hijack the thread via PM. Are you using neat image?
Hi
I played yesterday with noiseware , I applied the filter twice, the first pass didn't eliminate completely the noise so I did another one and the result was a lot smoother. Then I resized the image to 50%

Only downside is the fur in the rabbit lost it's detail also the back chart look a little weird- but I guess is because JPG compression artifacts not noise problem.
02-06-2008, 10:50 AM   #26
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What's one major complaint about the K10D? - Poor high ISO performance. I've never once complained about it. And when I look at high ISO shots from the K10D, they mostly look like crap because they're all underexposed - all shot by the same people complaining of poor performance no less. Come on already, even that Pentaxian Judy couldn't expose her blue eye correctly!! Yet, that's the shot you're supposed to use to judge how good the K20D is at noise? I certainly wasn't bragging, even if it seemed I was, I was merely stating the painfully obvious.. And yes, I know everyone who can properly expose an ISO 1600 shot is on this forum reading this now.. But for those who complain about poor ISO 1600 performace, take a look at these two photos by me.. Check the EXIF, whatever and tell me if you think the K10D has a ISO 1600 problem or not..

Slide show

and..

Slide show

Yes, both images are ISO 1600..

Here's a link to the RAW files..

http://www.dslreports.com/r0/download/1240837~542dd37fe3692d89bb45f874d740d97d/IMGP9204.zip

and..

http://www.dslreports.com/r0/download/1240860~36317ee06b357f83643a802c6c5c7da3/IMGP9214.zip

Last edited by Tom M; 02-06-2008 at 11:18 AM.
02-06-2008, 07:19 PM   #27
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QuoteOriginally posted by blende8 Quote
This is very unfair.
The K10D image is clearly out fo focus and the WB is off.

Overall I am impressed with the high ISO performance of the K20D.
But such biased tests don't help.
Yes, WB is off on the K10D shot, that shows the AWB on the K20D is better and can handle tungsten lighting...
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