Pentax KP vs. D750 raws at high ISO 25600 - Pentax APSC on par with Nikon FF

beholder3 · 02-11-2017, 04:23 AM

Download the ISO 25600 raws here:

Pentax KP:
http://216.18.212.226/PRODS/pentax-kp/FULLRES/KPhSLI025600NR0.DNG

Nikon D750:
http://216.18.212.226/PRODS/nikon-d750/FULLRES/D750hSLI25600NR0.NEF

Even in 100% view you have to search around a lot to find any insignificant differences.
Let alone what is left after postprocessing.
Definitely nothing any non-geeky viewer would ever recognize without direct comparison under a loupe.

Wow Pentax. Well done.

biz-engineer · 02-11-2017, 04:46 AM

Originally posted by beholder3

Even in 100% view you have to search around a lot to find any insignificant differences. Let alone what is left after postprocessing. Definitely nothing any non-geeky viewer would ever recognize without direct comparison under a loupe. Wow Pentax. Well done.

The KP seems to have improve SNR over K3. The gap between a KP and K1 seems to be less than it used to be. K1 shows much less chroma noise than any previous camera and they seem to have applied the same tech. on the KP.
Chroma noise is still very significant with other brands of cameras.

Kunzite · 02-11-2017, 04:54 AM

The K-1 doesn't have the "accelerator unit" from the K-70 and KP.

biz-engineer · 02-11-2017, 05:11 AM

Originally posted by Kunzite

The K-1 doesn't have the "accelerator unit" from the K-70 and KP.

Do you think the "accelerator" fits between the sensor and the DSP or is this accelerator (What's known as application processor) lies between the CPU and SD cards?

Kunzite · 02-11-2017, 05:17 AM - **1 Like**

The "accelerator unit" obviously fits on the camera's mainboard.

AldaCZ · 02-11-2017, 05:37 AM

Originally posted by Kunzite

The "accelerator unit" obviously fits on the camera's mainboard.

I wonder what a K1 with accelerator (pedal to metal

) could do

Mistral75 · 02-11-2017, 06:17 AM - **1 Like**

Originally posted by AldaCZ

I wonder what a K1 with accelerator (pedal to metal

) could do

Metal? Ask kenspo

AldaCZ · 02-11-2017, 06:27 AM

Originally posted by Mistral75

Metal? Ask kenspo

I wish they strapped it to the AF module !

DavidDwight · 02-11-2017, 06:40 AM - **1 Like**

Originally posted by Kunzite

The "accelerator unit" obviously fits on the camera's mainboard.

To the right of the brake and clutch ;-)

biz-engineer · 02-11-2017, 07:34 AM - **1 Like**

Originally posted by Kunzite

The "accelerator unit" obviously fits on the camera's mainboard.

Within the image data stream, is that a raw processing unit like Sony do? Or simply an small DSP performing 2D FFT (Jpeg conversion).
If I compare KP raw to K3 raw, KP is cleaner. So either the sensor itself delivers better S/N or there is some cleanup done on the raw itself.

---------- Post added 11-02-17 at 15:36 ----------

Originally posted by AldaCZ

I wish they strapped it to the AF module !

Ricoh need to add another unit, and call it Turbo AF :-)

normhead · 02-11-2017, 07:51 AM - **1 Like**

Originally posted by biz-engineer

Within the image data stream, is that a raw processing unit like Sony do? Or simply an small DSP performing 2D FFT (Jpeg conversion).
If I compare KP raw to K3 raw, KP is cleaner. So either the sensor itself delivers better S/N or there is some cleanup done on the raw itself.

---------- Post added 11-02-17 at 15:36 ----------

Ricoh need to add another unit, and call it Turbo AF :-)

Would it need an air scoop?

Kunzite · 02-11-2017, 07:53 AM

Originally posted by biz-engineer

Within the image data stream, is that a raw processing unit like Sony do? Or simply an small DSP performing 2D FFT (Jpeg conversion).
If I compare KP raw to K3 raw, KP is cleaner. So either the sensor itself delivers better S/N or there is some cleanup done on the raw itself.

---------- Post added 11-02-17 at 15:36 ----------

Ricoh need to add another unit, and call it Turbo AF :-)

I don't like to speculate especially in a technical matter such as this. From my understanding, though, it's also affecting RAWs.
Of course, the sensor is new and that might have the largest impact. The K-3's is 2013 or earlier.

Sagala · 02-11-2017, 08:01 AM

Originally posted by beholder3

Download the ISO 25600 raws here:

Pentax KP:
http://216.18.212.226/PRODS/pentax-kp/FULLRES/KPhSLI025600NR0.DNG

Nikon D750:
http://216.18.212.226/PRODS/nikon-d750/FULLRES/D750hSLI25600NR0.NEF

Even in 100% view you have to search around a lot to find any insignificant differences.
Let alone what is left after postprocessing.
Definitely nothing any non-geeky viewer would ever recognize without direct comparison under a loupe.

Wow Pentax. Well done.

Pentax KP 1600 vs 100 iso raw files : Fine details lost at 1600 iso.

normhead · 02-11-2017, 08:04 AM

Originally posted by Sagala

Pentax KP 1600 vs 100 iso raw files : Fine details lost at 1600 iso.

Same as my K-3, oh well, it was a nice bubble while it lasted.

kh1234567890 · 02-11-2017, 08:17 AM - **1 Like**

Looking at the KP RAW in RawDigger it does not look as if there is much processing being done - or it is well hidden with no missing levels. The dynamic range at that ISO is not all that great (about 1:1000) but that is to be expected. Chroma noise, which is usually much more disturbing than luma noise, is remarkably low. Nice one Pentax !

02-11-2017, 04:23 AM	#1
beholder3 Pentaxian Join Date: Dec 2011 Posts: 3,112	Pentax KP vs. D750 raws at high ISO 25600 - Pentax APSC on par with Nikon FF Download the ISO 25600 raws here: Pentax KP: http://216.18.212.226/PRODS/pentax-kp/FULLRES/KPhSLI025600NR0.DNG Nikon D750: http://216.18.212.226/PRODS/nikon-d750/FULLRES/D750hSLI25600NR0.NEF Even in 100% view you have to search around a lot to find any insignificant differences. Let alone what is left after postprocessing. Definitely nothing any non-geeky viewer would ever recognize without direct comparison under a loupe. Wow Pentax. Well done.

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02-11-2017, 04:46 AM	#2
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,244	Originally posted by beholder3 Even in 100% view you have to search around a lot to find any insignificant differences. Let alone what is left after postprocessing. Definitely nothing any non-geeky viewer would ever recognize without direct comparison under a loupe. Wow Pentax. Well done. The KP seems to have improve SNR over K3. The gap between a KP and K1 seems to be less than it used to be. K1 shows much less chroma noise than any previous camera and they seem to have applied the same tech. on the KP. Chroma noise is still very significant with other brands of cameras.

02-11-2017, 04:54 AM	#3
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	The K-1 doesn't have the "accelerator unit" from the K-70 and KP.

02-11-2017, 05:11 AM	#4
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,244	Originally posted by Kunzite The K-1 doesn't have the "accelerator unit" from the K-70 and KP. Do you think the "accelerator" fits between the sensor and the DSP or is this accelerator (What's known as application processor) lies between the CPU and SD cards?

02-11-2017, 05:17 AM - 1 Like	#5
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	The "accelerator unit" obviously fits on the camera's mainboard.

02-11-2017, 05:37 AM	#6
AldaCZ Veteran Member Join Date: Nov 2013 Location: North Bohemia Photos: Gallery Posts: 1,251	Originally posted by Kunzite The "accelerator unit" obviously fits on the camera's mainboard. I wonder what a K1 with accelerator (pedal to metal ) could do

02-11-2017, 06:17 AM - 1 Like	#7
Mistral75 Pentaxian Join Date: Feb 2009 Location: Paris, France Posts: 7,527	Originally posted by AldaCZ I wonder what a K1 with accelerator (pedal to metal ) could do Metal? Ask *kenspo*

02-11-2017, 06:27 AM	#8
AldaCZ Veteran Member Join Date: Nov 2013 Location: North Bohemia Photos: Gallery Posts: 1,251	Originally posted by Mistral75 Metal? Ask *kenspo* I wish they strapped it to the AF module !

02-11-2017, 06:40 AM - 1 Like	#9
DavidDwight Forum Member Join Date: May 2014 Location: Pittsburgh Photos: Gallery \| Albums Posts: 74	Originally posted by Kunzite The "accelerator unit" obviously fits on the camera's mainboard. To the right of the brake and clutch ;-)

02-11-2017, 07:34 AM - 1 Like	#10
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,244	Originally posted by Kunzite The "accelerator unit" obviously fits on the camera's mainboard. Within the image data stream, is that a raw processing unit like Sony do? Or simply an small DSP performing 2D FFT (Jpeg conversion). If I compare KP raw to K3 raw, KP is cleaner. So either the sensor itself delivers better S/N or there is some cleanup done on the raw itself. ---------- Post added 11-02-17 at 15:36 ---------- Originally posted by AldaCZ I wish they strapped it to the AF module ! Ricoh need to add another unit, and call it Turbo AF :-)

02-11-2017, 07:51 AM - 1 Like	#11
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	Originally posted by biz-engineer Within the image data stream, is that a raw processing unit like Sony do? Or simply an small DSP performing 2D FFT (Jpeg conversion). If I compare KP raw to K3 raw, KP is cleaner. So either the sensor itself delivers better S/N or there is some cleanup done on the raw itself. ---------- Post added 11-02-17 at 15:36 ---------- Ricoh need to add another unit, and call it Turbo AF :-) Would it need an air scoop?

02-11-2017, 07:53 AM	#12
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Originally posted by biz-engineer Within the image data stream, is that a raw processing unit like Sony do? Or simply an small DSP performing 2D FFT (Jpeg conversion). If I compare KP raw to K3 raw, KP is cleaner. So either the sensor itself delivers better S/N or there is some cleanup done on the raw itself. ---------- Post added 11-02-17 at 15:36 ---------- Ricoh need to add another unit, and call it Turbo AF :-) I don't like to speculate especially in a technical matter such as this. From my understanding, though, it's also affecting RAWs. Of course, the sensor is new and that might have the largest impact. The K-3's is 2013 or earlier.

02-11-2017, 08:04 AM	#14
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	Originally posted by Sagala Pentax KP 1600 vs 100 iso raw files : Fine details lost at 1600 iso. Same as my K-3, oh well, it was a nice bubble while it lasted.

02-11-2017, 08:17 AM - 1 Like	#15
kh1234567890 Veteran Member Join Date: Sep 2010 Location: Manchester, UK Photos: Gallery Posts: 2,653	Looking at the KP RAW in RawDigger it does not look as if there is much processing being done - or it is well hidden with no missing levels. The dynamic range at that ISO is not all that great (about 1:1000) but that is to be expected. Chroma noise, which is usually much more disturbing than luma noise, is remarkably low. Nice one Pentax !