Ricoh GR III

**savoche** · 12-07-2018, 07:25 AM

Originally posted by repaap

About that chip. I’v thought that it helps also general performance, because of that also AF.

Originally posted by D1N0

For general performance you have a cpu. Accelerator chips are dedicated (hard wired) to a certain task that the cpu can only do through software.

As I understand it (on the K-1 II, at least) the chip may indirectly help AF by offloading the CPU so it has more capacity to use on the focusing algorithm. This might be only "Internet wisdom", but I think it sounds reasonable.

reh321 · 12-07-2018, 08:59 AM - **1 Like**

Originally posted by savoche

As I understand it (on the K-1 II, at least) the chip may indirectly help AF by offloading the CPU so it has more capacity to use on the focusing algorithm. This might be only "Internet wisdom", but I think it sounds reasonable.

Problem with that reasoning is AF occurs before exposure and Noise Reduction occurs after exposure; I can see how "offloading" might work for video or burst shot AF after first frame, but not in general.

Kunzite · 12-07-2018, 09:08 AM

But image processing occurs after exposure too.

biz-engineer · 12-07-2018, 09:56 AM

Originally posted by Kunzite

But image processing occurs after exposure too.

But autofocus happens before the exposure.

Kunzite · 12-07-2018, 09:59 AM

Originally posted by biz-engineer

But autofocus happens before the exposure.

So it might help* for bursts and not for single frame shooting.

* I don't know, I'm discussing the possibility. This needs to be carefully measured by someone, anyone... as long as it's not me

biz-engineer · 12-07-2018, 10:00 AM - **1 Like**

Originally posted by reh321

Problem with that reasoning is AF occurs before exposure and Noise Reduction occurs after exposure; I can see how "offloading" might work for video or burst shot AF after first frame, but not in general.

Pentax AFS is normally as good as any other brands, Pentax AFC is less dynamic relative to other brands and that's where adding an image pre-processor helps freeing up some CPU time so that it's more responsive for AF tracking.

Rico · 12-07-2018, 10:00 AM

The Accelerator Unit is welcome news. This should be the 4th Generation AU. The increased battery capacity is another bonus. It will be sad if they don't squeak in Pixel-Shift. Even sadder the GRIII is shaping up to be a worthwhile upgrade from the GRII but will still be hobbled if they stay with UHS-I. Doesn't matter how fast the rest of the system is or how gigantic they make the "buffer" if the data takes forever to write to storage.

Doesn't the Autofocus module have it's own CPU? It is definitely independent of the Prime CPU which the AU works with.

**savoche** · 12-07-2018, 11:45 AM

Originally posted by reh321

Problem with that reasoning is AF occurs before exposure and Noise Reduction occurs after exposure; I can see how "offloading" might work for video or burst shot AF after first frame, but not in general.

Yes, if the chip indeed is only for noise reduction I'd say you're right. Unless there's some sort of reservation of CPU cycles - which I find very unlikely.

Originally posted by biz-engineer

Pentax AFS is normally as good as any other brands, Pentax AFC is less dynamic relative to other brands and that's where adding an image pre-processor helps freeing up some CPU time so that it's more responsive for AF tracking.

Yes, the Pentax AF-S is really quite good. People tend to lump it in with the more pedestrian AF-C.

Not that the GR is meant to be a super action camera with high FPS and a deep buffer. At least the way I use it the current AF is already more than good enough. Snap focus works very well, too.

repaap · 12-07-2018, 12:19 PM

Originally posted by D1N0

For general performance you have a cpu. Accelerator chips are dedicated (hard wired) to a certain task that the cpu can only do through software. The one in the K70/KP/K1 II is for denoising. Other brands have dedicated accelerator chips for AF performance.

alright! yea I did chech it out and also looked high iso on that GR 100 K. so it is for that. it could give good ISO 10-20k with SR sounds like nice combination for more performance.

ogl · 12-07-2018, 03:07 PM

if 1/8 and 1/10 are 100% effectiveness with SR for GRIII it sounds very good. the users said that 1 seс is good result too. 2-5 stops are good news.

ISO100

1 sec and f2.8 mean approx. EV3
1/8 seс and f2.8 = EV6

EV3 Fireworks (with time exposure).
EV4 Candle lit close-ups. Christmas lights, floodlit buildings, fountains, and monuments. Subjects under bright street lamps.
EV5 Night home interiors, average light. School or church auditoriums. Subjects lit by campfires or bonfires.
EV6 Brightly lit home interiors at night. Fairs, amusement parks.

totsmuyco · 12-07-2018, 06:19 PM

I know this may be a stupid question but some here said that they've experienced dust on the GR's sensor. How can that happened when it's a fixed lens camera? It's supposedly a closed system.

**clackers** · 12-07-2018, 09:08 PM

Originally posted by totsmuyco

I know this may be a stupid question but some here said that they've experienced dust on the GR's sensor. How can that happened when it's a fixed lens camera? It's supposedly a closed system.

No, it's not WR, the case isn't sealed.

And almost no compact from any brand is.

thibs · 12-08-2018, 01:00 AM

Originally posted by Rico

The Accelerator Unit is welcome news. This should be the 4th Generation AU. The increased battery capacity is another bonus. It will be sad if they don't squeak in Pixel-Shift. Even sadder the GRIII is shaping up to be a worthwhile upgrade from the GRII but will still be hobbled if they stay with UHS-I. Doesn't matter how fast the rest of the system is or how gigantic they make the "buffer" if the data takes forever to write to storage.

Doesn't the Autofocus module have it's own CPU? It is definitely independent of the Prime CPU which the AU works with.

I've never felt my GR (I) to be hobbed un any way because of slow write speed to card.
Not as if the GR was made for action so I dont see the slightest problem.

JPT · 12-08-2018, 03:10 AM - **1 Like**

The official GR Blog now has an article about the GR Night event in Japan. It's similar the other Japanese reports, but the product planners goes into why they decided to hold this event a few months ahead of the launch.

(Japanese) ?GR NIGHT????? ?????? | GR official | ??????????????
(negligé via Google) Google Translate

Kunzite · 12-08-2018, 03:31 AM

Originally posted by thibs

I've never felt my GR (I) to be hobbed un any way because of slow write speed to card.
Not as if the GR was made for action so I dont see the slightest problem.

The GR III will have 2GB internal storage; I don't think write speed will be an issue.

12-07-2018, 11:45 AM	#428
savoche Master of the obvious Join Date: Jun 2011 Location: Lowlands of Norway Posts: 18,311	Originally posted by reh321 Problem with that reasoning is AF occurs before exposure and Noise Reduction occurs after exposure; I can see how "offloading" might work for video or burst shot AF after first frame, but not in general. Yes, if the chip indeed is only for noise reduction I'd say you're right. Unless there's some sort of reservation of CPU cycles - which I find very unlikely. Originally posted by biz-engineer Pentax AFS is normally as good as any other brands, Pentax AFC is less dynamic relative to other brands and that's where adding an image pre-processor helps freeing up some CPU time so that it's more responsive for AF tracking. Yes, the Pentax AF-S is really quite good. People tend to lump it in with the more pedestrian AF-C. Not that the GR is meant to be a super action camera with high FPS and a deep buffer. At least the way I use it the current AF is already more than good enough. Snap focus works very well, too. Last edited by savoche; 12-07-2018 at 11:54 AM.

12-07-2018, 03:07 PM	#430
ogl Banned Join Date: Dec 2007 Location: Sankt Peterburg Photos: Gallery \| Albums Posts: 8,382	if 1/8 and 1/10 are 100% effectiveness with SR for GRIII it sounds very good. the users said that 1 seс is good result too. 2-5 stops are good news. ISO100 1 sec and f2.8 mean approx. EV3 1/8 seс and f2.8 = EV6 EV3 Fireworks (with time exposure). EV4 Candle lit close-ups. Christmas lights, floodlit buildings, fountains, and monuments. Subjects under bright street lamps. EV5 Night home interiors, average light. School or church auditoriums. Subjects lit by campfires or bonfires. EV6 Brightly lit home interiors at night. Fairs, amusement parks. Last edited by ogl; 12-07-2018 at 03:22 PM.

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12-07-2018, 07:25 AM	#421
savoche Master of the obvious Join Date: Jun 2011 Location: Lowlands of Norway Posts: 18,311	Originally posted by repaap About that chip. I’v thought that it helps also general performance, because of that also AF. Originally posted by D1N0 For general performance you have a cpu. Accelerator chips are dedicated (hard wired) to a certain task that the cpu can only do through software. As I understand it (on the K-1 II, at least) the chip may indirectly help AF by offloading the CPU so it has more capacity to use on the focusing algorithm. This might be only "Internet wisdom", but I think it sounds reasonable.

12-07-2018, 08:59 AM - 1 Like	#422
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,181	Originally posted by savoche As I understand it (on the K-1 II, at least) the chip may indirectly help AF by offloading the CPU so it has more capacity to use on the focusing algorithm. This might be only "Internet wisdom", but I think it sounds reasonable. Problem with that reasoning is AF occurs before exposure and Noise Reduction occurs after exposure; I can see how "offloading" might work for video or burst shot AF after first frame, but not in general.

12-07-2018, 09:08 AM	#423
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	But image processing occurs after exposure too.

12-07-2018, 09:56 AM	#424
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,239	Originally posted by Kunzite But image processing occurs after exposure too. But autofocus happens before the exposure.

12-07-2018, 09:59 AM	#425
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Originally posted by biz-engineer But autofocus happens before the exposure. So it might help* for bursts and not for single frame shooting. * I don't know, I'm discussing the possibility. This needs to be carefully measured by someone, anyone... as long as it's not me

12-07-2018, 10:00 AM - 1 Like	#426
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,239	Originally posted by reh321 Problem with that reasoning is AF occurs before exposure and Noise Reduction occurs after exposure; I can see how "offloading" might work for video or burst shot AF after first frame, but not in general. Pentax AFS is normally as good as any other brands, Pentax AFC is less dynamic relative to other brands and that's where adding an image pre-processor helps freeing up some CPU time so that it's more responsive for AF tracking.

12-07-2018, 10:00 AM	#427
Rico Veteran Member Join Date: Mar 2007 Posts: 1,205	The Accelerator Unit is welcome news. This should be the 4th Generation AU. The increased battery capacity is another bonus. It will be sad if they don't squeak in Pixel-Shift. Even sadder the GRIII is shaping up to be a worthwhile upgrade from the GRII but will still be hobbled if they stay with UHS-I. Doesn't matter how fast the rest of the system is or how gigantic they make the "buffer" if the data takes forever to write to storage. Doesn't the Autofocus module have it's own CPU? It is definitely independent of the Prime CPU which the AU works with.

12-07-2018, 12:19 PM	#429
repaap Pentaxian Join Date: Oct 2010 Photos: Gallery \| Albums Posts: 6,242	Originally posted by D1N0 For general performance you have a cpu. Accelerator chips are dedicated (hard wired) to a certain task that the cpu can only do through software. The one in the K70/KP/K1 II is for denoising. Other brands have dedicated accelerator chips for AF performance. alright! yea I did chech it out and also looked high iso on that GR 100 K. so it is for that. it could give good ISO 10-20k with SR sounds like nice combination for more performance.

12-07-2018, 06:19 PM	#431
totsmuyco Pentaxian Join Date: Aug 2013 Location: Iloilo City Photos: Gallery Posts: 2,276	I know this may be a stupid question but some here said that they've experienced dust on the GR's sensor. How can that happened when it's a fixed lens camera? It's supposedly a closed system.

12-07-2018, 09:08 PM	#432
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by totsmuyco I know this may be a stupid question but some here said that they've experienced dust on the GR's sensor. How can that happened when it's a fixed lens camera? It's supposedly a closed system. No, it's not WR, the case isn't sealed. And almost no compact from any brand is.

12-08-2018, 01:00 AM	#433
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001	Originally posted by Rico The Accelerator Unit is welcome news. This should be the 4th Generation AU. The increased battery capacity is another bonus. It will be sad if they don't squeak in Pixel-Shift. Even sadder the GRIII is shaping up to be a worthwhile upgrade from the GRII but will still be hobbled if they stay with UHS-I. Doesn't matter how fast the rest of the system is or how gigantic they make the "buffer" if the data takes forever to write to storage. Doesn't the Autofocus module have it's own CPU? It is definitely independent of the Prime CPU which the AU works with. I've never felt my GR (I) to be hobbed un any way because of slow write speed to card. Not as if the GR was made for action so I dont see the slightest problem.

12-08-2018, 03:10 AM - 1 Like	#434
JPT Pentaxian Join Date: Jan 2012 Location: Tokyo Photos: Gallery Posts: 2,821	The official GR Blog now has an article about the GR Night event in Japan. It's similar the other Japanese reports, but the product planners goes into why they decided to hold this event a few months ahead of the launch. (Japanese) ?GR NIGHT????? ?????? \| GR official \| ?????????????? (negligé via Google) Google Translate

12-08-2018, 03:31 AM	#435
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Originally posted by thibs I've never felt my GR (I) to be hobbed un any way because of slow write speed to card. Not as if the GR was made for action so I dont see the slightest problem. The GR III will have 2GB internal storage; I don't think write speed will be an issue.