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Oxygenum · 04-28-2021, 11:55 PM - **2 Likes**

Photons to Photos

Ishpuini · 04-29-2021, 12:14 AM

Thanks for that!

It would be nice to see the K-3 II on that chart as well.

Wim

wkadruje · 04-29-2021, 12:21 AM

Originally posted by Ishpuini

Thanks for that!

It would be nice to see the K-3 II on that chart as well.

Wim

haven't they tested k-3II?

Oxygenum · 04-29-2021, 12:27 AM - **1 Like**

Originally posted by Ishpuini

Thanks for that!

It would be nice to see the K-3 II on that chart as well.

Wim

Add K-3 II

Ishpuini · 04-29-2021, 12:41 AM

Originally posted by chriswill

haven't they tested k-3II?

I think they have, since it is listed on the right of the image.

---------- Post added 29-04-21 at 09:47 ----------

Originally posted by Oxygenum

Add K-3 II

Super, thanks!

Wow, that looks different. Quite a dramatic improvement from the K-3 II. Of course this is as expected, but still it is interesting to see the difference compared to the difference between the K-3 III and the other cameras you selected.

Wim

Oxygenum · 04-29-2021, 12:52 AM

Originally posted by Ishpuini

I think they have, since it is listed on the right of the image.

---------- Post added 29-04-21 at 09:47 ----------

Super, thanks!

Wow, that looks different. Quite a dramatic improvement from the K-3 II. Of course this is as expected, but still it is interesting to see the difference compared to the difference between the K-3 III and the other cameras you selected.

Wim

No problem , click on the link and choose any camera to compare....

Photographic Dynamic Range versus ISO Setting

Ishpuini · 04-29-2021, 12:53 AM

On a different point, judging from the jump in the curves, it does seem the K-3 III accelerator kicks in earlier than in previous models (except for the GR III that I see you also added), where this happens beyond ISO400. In the K-3 III it seems only ISO100 is accelerator free?

EDIT: interesting to see the shape of the K-3 III curve is most similar to the one of the GR III. I love the IQ of the GR III...

Not sure I'm this interpretation is correct though?

Regardless, the IQ of the images out of the camera will be the final judge.

Wim

Last edited by Ishpuini; 04-29-2021 at 01:00 AM.

**RobA_Oz** · 04-29-2021, 01:20 AM - **2 Likes**

Even more interesting is the advantage over competing APS-C cameras:

Oxygenum · 04-29-2021, 01:23 AM - **1 Like**

Wow, Pentax best in APS-C cameras!

**Henrico** · 04-29-2021, 01:29 AM

Same philosophy K3ii => K3iii as Ricoh engineers did with K1 => K1ii. Accelerator applies noise reduction in RAW files. I am absolutely happy with my K1ii and the output at higher ISO's. So no issue for me.

BarneyL · 04-29-2021, 01:46 AM - **4 Likes**

Bill Claff shared his analysis of K-3 III's sensor on "the other forum".

Quote:

Except between ISO 100 and ISO 160 there is very strong Noise Reduction (NR) baked into the raw data even with NR set to off.
These results are not comparable to any other cameras.
Note that the NR is so strong that the camera measures well above what a perfect sensor could accomplish.

Andrea K · 04-29-2021, 01:55 AM

They want to measure with the numbers what is stated not measurable with numbers.

MetalUndivided · 04-29-2021, 02:09 AM

That's fairly impressive. It manages to outdo most of the FF sensors it looks like.

Kunzite · 04-29-2021, 02:23 AM - **3 Likes**

I'd wish Bill Claff would remove his claim of being "trusted source"; that isn't up to him to decide.

3by2 · 04-29-2021, 02:28 AM

Can someone tell me how their can be a jump in dynamic range 'after' 200ish ISO. Presumably this is some jiggery pokery in an onboard processor chip?

04-28-2021, 11:55 PM - 2 Likes	#1
Oxygenum Forum Member Join Date: Feb 2014 Posts: 70	K-3 Mark III compare to other Pentax cameras. Photons to Photos

04-29-2021, 12:41 AM	#5
Ishpuini Veteran Member Join Date: Sep 2006 Location: Antwerp, Belgium Photos: Gallery Posts: 1,727	Originally posted by chriswill haven't they tested k-3II? I think they have, since it is listed on the right of the image. ---------- Post added 29-04-21 at 09:47 ---------- Originally posted by Oxygenum Add K-3 II Super, thanks! Wow, that looks different. Quite a dramatic improvement from the K-3 II. Of course this is as expected, but still it is interesting to see the difference compared to the difference between the K-3 III and the other cameras you selected. Wim Last edited by Ishpuini; 04-29-2021 at 12:48 AM.

04-29-2021, 01:20 AM - 2 Likes	#8
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	Even more interesting is the advantage over competing APS-C cameras: Attached Images

04-29-2021, 01:46 AM - 4 Likes	#11
BarneyL Pentaxian Join Date: Feb 2017 Posts: 900	K-3 III - Photons to Photos sensor DR measurements Bill Claff shared his analysis of K-3 III's sensor on "the other forum". Quote: Except between ISO 100 and ISO 160 there is very strong Noise Reduction (NR) baked into the raw data even with NR set to off. These results are not comparable to any other cameras. Note that the NR is so strong that the camera measures well above what a perfect sensor could accomplish.

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04-29-2021, 12:14 AM	#2
Ishpuini Veteran Member Join Date: Sep 2006 Location: Antwerp, Belgium Photos: Gallery Posts: 1,727	Thanks for that! It would be nice to see the K-3 II on that chart as well. Wim

04-29-2021, 12:21 AM	#3
wkadruje Senior Member Join Date: Mar 2015 Posts: 145	Originally posted by Ishpuini Thanks for that! It would be nice to see the K-3 II on that chart as well. Wim haven't they tested k-3II?

04-29-2021, 12:27 AM - 1 Like	#4
Oxygenum Forum Member Join Date: Feb 2014 Posts: 70 Original Poster	Originally posted by Ishpuini Thanks for that! It would be nice to see the K-3 II on that chart as well. Wim Add K-3 II

04-29-2021, 12:52 AM	#6
Oxygenum Forum Member Join Date: Feb 2014 Posts: 70 Original Poster	Originally posted by Ishpuini I think they have, since it is listed on the right of the image. ---------- Post added 29-04-21 at 09:47 ---------- Super, thanks! Wow, that looks different. Quite a dramatic improvement from the K-3 II. Of course this is as expected, but still it is interesting to see the difference compared to the difference between the K-3 III and the other cameras you selected. Wim No problem , click on the link and choose any camera to compare.... Photographic Dynamic Range versus ISO Setting

04-29-2021, 12:53 AM	#7
Ishpuini Veteran Member Join Date: Sep 2006 Location: Antwerp, Belgium Photos: Gallery Posts: 1,727	On a different point, judging from the jump in the curves, it does seem the K-3 III accelerator kicks in earlier than in previous models (except for the GR III that I see you also added), where this happens beyond ISO400. In the K-3 III it seems only ISO100 is accelerator free? EDIT: interesting to see the shape of the K-3 III curve is most similar to the one of the GR III. I love the IQ of the GR III... Not sure I'm this interpretation is correct though? Regardless, the IQ of the images out of the camera will be the final judge. Wim Last edited by Ishpuini; 04-29-2021 at 01:00 AM.

04-29-2021, 01:23 AM - 1 Like	#9
Oxygenum Forum Member Join Date: Feb 2014 Posts: 70 Original Poster	Wow, Pentax best in APS-C cameras!

04-29-2021, 01:29 AM	#10
Henrico Loyal Site Supporter Join Date: Jun 2013 Location: Utrecht Photos: Gallery Posts: 255	Same philosophy K3ii => K3iii as Ricoh engineers did with K1 => K1ii. Accelerator applies noise reduction in RAW files. I am absolutely happy with my K1ii and the output at higher ISO's. So no issue for me.

04-29-2021, 01:55 AM	#12
Andrea K Pentaxian Join Date: Mar 2009 Location: Rome, Italy Posts: 822	They want to measure with the numbers what is stated not measurable with numbers.

04-29-2021, 02:09 AM	#13
MetalUndivided Senior Member Join Date: Apr 2019 Location: Irkutsk, Russia Posts: 134	That's fairly impressive. It manages to outdo most of the FF sensors it looks like.

04-29-2021, 02:23 AM - 3 Likes	#14
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	I'd wish Bill Claff would remove his claim of being "trusted source"; that isn't up to him to decide.

04-29-2021, 02:28 AM	#15
3by2 Closed Account Join Date: Feb 2019 Photos: Gallery \| Albums Posts: 819	Can someone tell me how their can be a jump in dynamic range 'after' 200ish ISO. Presumably this is some jiggery pokery in an onboard processor chip?

K-3 III - Photons to Photos sensor DR measurements

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