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ogl · 10-03-2009, 10:07 AM

K-7 review at DPReview and DR/noise.ATTN: GordonBGood and Oleg_V: Pentax SLR Talk Forum: Digital Photography Review

Please, pay attention

falconeye · 10-03-2009, 10:44 AM

Originally posted by ogl

Please, pay attention

Funny that you ask for physicists there

BTW, IEC 62220-1 is a norm written by physicists to measure noise. It is applied to x-ray photography where it does really matter as increasing the luminosity is killing people ...

This is a good description but it is in German:
ISS: DQE

You may find similiarly good descriptions in other languages when googling for the IEC standard.

BTW, dynamic range and noise are closely related but one cannot exactly be computed from the other. The reason for this is that noise isn't entirely shot noise. For shot noise only, it would be true. Also, both are meaningless measures if defined on the pixel scale.

ogl · 10-03-2009, 10:53 AM

Me? I know Oleg_V. But this thread is not mine.

falconeye · 10-03-2009, 11:17 AM

Originally posted by ogl

Me? I know Oleg_V. But this thread is not mine.

Sorry, I thought, your were yana36. My apologies

ogl · 10-03-2009, 07:16 PM

Originally posted by falconeye

Sorry, I thought, your were yana36. My apologies

Somebody said it here, because I made "copy-paste" of yana36's posts from dpreview forum sometimes.

mickey · 10-03-2009, 09:41 PM

Overall a positive review for the K-7.
Worth the wait...finally.

Like falk wrote though, what's with the K20/D50/D300 noise comparison test, and where was it for the actual K20D review?

Very suspicious...

wll · 10-04-2009, 05:23 AM

Originally posted by mickey

Overall a positive review for the K-7.
Worth the wait...finally.

Like falk wrote though, what's with the K20/D50/D300 noise comparison test, and where was it for the actual K20D review?

Very suspicious...

K20D review was last year. This review makes me very happy I have K20D's and not the new K-7. K20D was and is a pretty good camera as shown by the K-7 review.

I think Pentax's next generation of DSLR's will be a big leap forward. I don't see Hoya as a me too camera company.

wll

thibs · 10-04-2009, 07:49 AM

Originally posted by wll

K20D review was last year. This review makes me very happy I have K20D's and not the new K-7.

Mmmm? Why? Except the sensor, just everything is better. And quite better. I can testify.

Originally posted by wll

K20D was and is a pretty good camera as shown by the K-7 review.

Of course it was, and still is. There's nothing wrong with the K20D. The K-7's arrival doesn't make the previous camera a bad one. Not at all.

GLXLR · 10-04-2009, 03:42 PM

Originally posted by wowtip

Good review. Maybe "Value" and "Ergonomics" should be a notch or two higher.

I wish they would release Digital Camera Utility 4 for older bodies.

Looking at ISO800 samples full screen, I am a bit confused that K-7 (and K20D) looks to have much more contrast and saturation than D300 or 50D. Did they shoot in vivid mode or what?

I agree, even the D300 got a 9.0 value when it was released for $2000...

JPEG engine for the k-7 adds a lot of contrast and saturation. That's why I shoot RAW!

ogl · 10-04-2009, 09:27 PM

Originally posted by thibs

Mmmm? Why? Except the sensor, just everything is better. And quite better. I can testify.

Of course it was, and still is. There's nothing wrong with the K20D. The K-7's arrival doesn't make the previous camera a bad one. Not at all.

The sensor is better too. And with new technology
DSLR Image Sensor Innovation ? Who Is Challenging Canon and Nikon?s lead? - Chipworks Inside Angle | Blog on Semiconductor International

fejker · 10-07-2009, 09:56 AM

I'm just curious ... did they upgrade the K-7 firmware before testing or was the review done on 1.0? I'm asking because I'm very impressed with the K-7 and not at all with the 50D (let's leave the D300 aside because I haven't had much experience with that camera).

I like the K-7 noise handling and really like the resolution/detail even tho at first the pictures taken with the K-7 seemed a bit soft (forgot to take into account that the pictures are bigger now).

@ogl
Is it true about the K-7 noise handling in RAW (starts at ISO1600)? Because I was sure you can change that in the settings and can set it to start NR at ISO200 and up or turn it off completely. I'm sure that setting works for both JPG and RAW.
Or are you talking about default settings where high ISO NR starts at ISO1600?

m8o · 04-03-2010, 09:35 PM

I thought it worth noting, DPR recently updated their rating system quite dramatically. K-7 went from 'Highly Recommended' to 74%.

How do you go from 'highly recommended' to 'sub-par' [which I consider to be 74%] without changing the basis for the conclusion at all??

starbase218 · 04-04-2010, 12:28 AM

Originally posted by m8o

I thought it worth noting, DPR recently updated their rating system quite dramatically. K-7 went from 'Highly Recommended' to 74%.

How do you go from 'highly recommended' to 'sub-par' [which I consider to be 74%] without changing the basis for the conclusion at all??

Maybe DPR does consider 74% to be highly recommended. Have you cross-referenced other camera reviews?

jogiba · 04-04-2010, 06:31 AM

Originally posted by m8o

I thought it worth noting, DPR recently updated their rating system quite dramatically. K-7 went from 'Highly Recommended' to 74%.

How do you go from 'highly recommended' to 'sub-par' [which I consider to be 74%] without changing the basis for the conclusion at all??

DPR gave the Canon 550D/T2i 77% or DPR Gold Award.
Canon EOS 550D / Rebel T2i Review: 29. Conclusion: Digital Photography Review

zackspeed · 04-04-2010, 07:21 AM

DPreview Qualitytests

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10-03-2009, 10:07 AM	#31
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382	K-7 review at DPReview and DR/noise.ATTN: GordonBGood and Oleg_V: Pentax SLR Talk Forum: Digital Photography Review Please, pay attention

10-03-2009, 10:44 AM	#32
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by ogl Please, pay attention Funny that you ask for physicists there BTW, IEC 62220-1 is a norm written by physicists to measure noise. It is applied to x-ray photography where it does really matter as increasing the luminosity is killing people ... This is a good description but it is in German: ISS: DQE You may find similiarly good descriptions in other languages when googling for the IEC standard. BTW, dynamic range and noise are closely related but one cannot exactly be computed from the other. The reason for this is that noise isn't entirely shot noise. For shot noise only, it would be true. Also, both are meaningless measures if defined on the pixel scale.

10-03-2009, 10:53 AM	#33
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382	Me? I know Oleg_V. But this thread is not mine.

10-03-2009, 11:17 AM	#34
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by ogl Me? I know Oleg_V. But this thread is not mine. Sorry, I thought, your were yana36. My apologies

10-03-2009, 07:16 PM	#35
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382	Originally posted by falconeye Sorry, I thought, your were yana36. My apologies Somebody said it here, because I made "copy-paste" of yana36's posts from dpreview forum sometimes.

10-03-2009, 09:41 PM	#36
mickey Veteran Member Join Date: Oct 2008 Location: Japan Photos: Gallery \| Albums Posts: 1,146	Overall a positive review for the K-7. Worth the wait...finally. Like falk wrote though, what's with the K20/D50/D300 noise comparison test, and where was it for the actual K20D review? Very suspicious...

10-04-2009, 05:23 AM	#37
wll Veteran Member Join Date: Nov 2006 Location: Mission Hills, CA Posts: 773	Originally posted by mickey Overall a positive review for the K-7. Worth the wait...finally. Like falk wrote though, what's with the K20/D50/D300 noise comparison test, and where was it for the actual K20D review? Very suspicious... K20D review was last year. This review makes me very happy I have K20D's and not the new K-7. K20D was and is a pretty good camera as shown by the K-7 review. I think Pentax's next generation of DSLR's will be a big leap forward. I don't see Hoya as a me too camera company. wll

10-04-2009, 07:49 AM	#38
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001	Originally posted by wll K20D review was last year. This review makes me very happy I have K20D's and not the new K-7. Mmmm? Why? Except the sensor, just everything is better. And quite better. I can testify. Originally posted by wll K20D was and is a pretty good camera as shown by the K-7 review. Of course it was, and still is. There's nothing wrong with the K20D. The K-7's arrival doesn't make the previous camera a bad one. Not at all.

10-04-2009, 03:42 PM	#39
GLXLR Veteran Member Join Date: Feb 2009 Location: Sugar Land, TX Photos: Gallery Posts: 684	Originally posted by wowtip Good review. Maybe "Value" and "Ergonomics" should be a notch or two higher. I wish they would release Digital Camera Utility 4 for older bodies. Looking at ISO800 samples full screen, I am a bit confused that K-7 (and K20D) looks to have much more contrast and saturation than D300 or 50D. Did they shoot in vivid mode or what? I agree, even the D300 got a 9.0 value when it was released for $2000... JPEG engine for the k-7 adds a lot of contrast and saturation. That's why I shoot RAW!

10-04-2009, 09:27 PM	#40
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382	Originally posted by thibs Mmmm? Why? Except the sensor, just everything is better. And quite better. I can testify. Of course it was, and still is. There's nothing wrong with the K20D. The K-7's arrival doesn't make the previous camera a bad one. Not at all. The sensor is better too. And with new technology DSLR Image Sensor Innovation ? Who Is Challenging Canon and Nikon?s lead? - Chipworks Inside Angle \| Blog on Semiconductor International

04-04-2010, 07:21 AM	#45
zackspeed Veteran Member Join Date: Mar 2010 Posts: 527	DPreview Qualitytests

10-07-2009, 09:56 AM	#41
fejker Inactive Account Join Date: Sep 2008 Location: Slovenia Photos: Gallery Posts: 258	I'm just curious ... did they upgrade the K-7 firmware before testing or was the review done on 1.0? I'm asking because I'm very impressed with the K-7 and not at all with the 50D (let's leave the D300 aside because I haven't had much experience with that camera). I like the K-7 noise handling and really like the resolution/detail even tho at first the pictures taken with the K-7 seemed a bit soft (forgot to take into account that the pictures are bigger now). @ogl Is it true about the K-7 noise handling in RAW (starts at ISO1600)? Because I was sure you can change that in the settings and can set it to start NR at ISO200 and up or turn it off completely. I'm sure that setting works for both JPG and RAW. Or are you talking about default settings where high ISO NR starts at ISO1600?

04-03-2010, 09:35 PM	#42
m8o Veteran Member Join Date: Jul 2007 Location: 40°-55'-44" N / 73°-24'-07" W [on LI] Photos: Gallery \| Albums Posts: 3,092	I thought it worth noting, DPR recently updated their rating system quite dramatically. K-7 went from 'Highly Recommended' to 74%. How do you go from 'highly recommended' to 'sub-par' [which I consider to be 74%] without changing the basis for the conclusion at all??

04-04-2010, 12:28 AM	#43
starbase218 Inactive Account Join Date: Sep 2009 Location: Planet Earth, Sol system, Milky Way galaxy, Universe Posts: 1,119	Originally posted by m8o I thought it worth noting, DPR recently updated their rating system quite dramatically. K-7 went from 'Highly Recommended' to 74%. How do you go from 'highly recommended' to 'sub-par' [which I consider to be 74%] without changing the basis for the conclusion at all?? Maybe DPR does consider 74% to be highly recommended. Have you cross-referenced other camera reviews?

04-04-2010, 06:31 AM	#44
jogiba Banned Join Date: Sep 2006 Location: Millstone,NJ Posts: 6,491	Originally posted by m8o I thought it worth noting, DPR recently updated their rating system quite dramatically. K-7 went from 'Highly Recommended' to 74%. How do you go from 'highly recommended' to 'sub-par' [which I consider to be 74%] without changing the basis for the conclusion at all?? DPR gave the Canon 550D/T2i 77% or DPR Gold Award. Canon EOS 550D / Rebel T2i Review: 29. Conclusion: Digital Photography Review

DPReview K-7 Review..

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