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09-17-2010, 03:22 AM   #1
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Pentax K-r Samples.....inc 25600

I found a sample that I had not seen before on this site.
Pentax K-R hi iso samples (Firmware 0.2) [Archive] - PhotoMalaysia Community

Only the 1600 picture and the last 256000 work.
So I tried to find all the pictures.
They can be accessed here

Index of /camaras_digitales/noticias

You will need to scroll down to Pentax K-r.
Bear in mind that they use the kit lens, Jpegs and its firmware 0.2
The 6400 sample looks more detailed than the 3200, probably because of the lens.
Just for the moment concentrate on noise performance.

09-17-2010, 03:28 AM   #2
raz
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they all work if you delete the ISO.... after the url (the url is bad in their format).
But I think most of them were already seen here, they are from a review from a spanish site.
09-17-2010, 03:40 AM   #3
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Are these taken with in camera noise reduction on? Something doesn't look right about the noise.
09-17-2010, 04:02 AM   #4
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QuoteOriginally posted by amoringello Quote
Are these taken with in camera noise reduction on? Something doesn't look right about the noise.
Who knows, Probably,
You can be certain that in Raw you can always achieve more than in Jpeg, which would be critical at High ISO.

I have downloaded the 6400 sample, the 12800 and 25600.
The 12800 sharpens up a lot!!!! and its easy to clean in denoise software.
I will see if I can upload them somewhere.

09-17-2010, 04:06 AM   #5
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Edited samples

Because I thought the lens is very unsharp, I decided to sharpen the images. I also did some NR work in Topaz denoise
And I downscaled the 12800 image and 25600 image to 50% simply because I think looking at a heavily sharpened, pre production Jpeg is unfair at 100%....... but it is very impressive at 50%

The 6400 sample is at 75%.

6400
http://masters.galleries.dpreview.com.s3.amazonaws.com/548492.jpg?AWSAccessK...7GpCphWqrmg%3d
12800
http://masters.galleries.dpreview.com.s3.amazonaws.com/548493.jpg?AWSAccessK...CAEqetfiHI4%3d
25600
http://masters.galleries.dpreview.com.s3.amazonaws.com/548494.jpg?AWSAccessK...NHIHMdb3nBU%3d

The 12800 image is particularli impressive because if the color is all there!!
09-17-2010, 04:25 AM   #6
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QuoteOriginally posted by Steelski Quote
Because I thought the lens is very unsharp, I decided to sharpen the images. I also did some NR work in Topaz denoise
And I downscaled the 12800 image and 25600 image to 50% simply because I think looking at a heavily sharpened, pre production Jpeg is unfair at 100%....... but it is very impressive at 50%

The 6400 sample is at 75%.

6400
http://masters.galleries.dpreview.com.s3.amazonaws.com/548492.jpg?AWSAccessK...7GpCphWqrmg%3d
12800
http://masters.galleries.dpreview.com.s3.amazonaws.com/548493.jpg?AWSAccessK...CAEqetfiHI4%3d
25600
http://masters.galleries.dpreview.com.s3.amazonaws.com/548494.jpg?AWSAccessK...NHIHMdb3nBU%3d

The 12800 image is particularli impressive because if the color is all there!!
Following your links, I get: AccessDeniedRequest has expiredB4B23AF6558C9E952010-09-17T11:16:18ZAhSepvLW45vLoww/KYa6qM+hQiruRubJnFtghdhXV/s23Hvnc8ZoiSOcSj3ozHiG2010-09-17T11:24:55Z

- Bert
09-17-2010, 07:11 AM   #7
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Just noticed... ISO 100 to ISO 256000 is the same range (in f-stops) as f/1.4 to f/22, or as 1/2s to 1/1000s. It seems TAv mode would finally match Av and Tv in terms of usability. I doubted TAv usability when it was introduced with K10D, but I do not anymore.
09-17-2010, 06:10 PM   #8
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QuoteOriginally posted by Ivan Glisin Quote
Just noticed... ISO 100 to ISO 256000 is the same range (in f-stops) as f/1.4 to f/22, or as 1/2s to 1/1000s. It seems TAv mode would finally match Av and Tv in terms of usability. I doubted TAv usability when it was introduced with K10D, but I do not anymore.
Well, I won't say you can always use it, but I was able to use TAv mode with f/2.8 lenses on daylight for quite some time.

09-17-2010, 07:17 PM   #9
Ash
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Hard to judge these results - I question the focusing and exposure, but otherwise reasonably good noise for ISO 12800, not the best but acceptable for web at ISO 25600.
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