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What would the FFF have to do in order to be competative?

Started 1 month ago | Discussions
dellaaa
dellaaa Senior Member • Posts: 1,201
What would the FFF have to do in order to be competative?
1

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP). Will the FFF shoot at the frame rates of the current Bayers?  Again, given the history, this seems doubtful.

So with low light and speed out of the equation, whats left, detail and color rendition.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors? Would the advantage in detail make up for the shortcoming?

The remaining design criteria, is color.  Would Sigma's color rendition be enough for people to buy it?

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

At this point, fanboys aside, the fact that we are still discussing this seems a bit absurd to me, so why did I start this thread lol?.

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xpatUSA
xpatUSA Forum Pro • Posts: 23,016
Re: What would the FFF have to do in order to be competative?
1

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP). Will the FFF shoot at the frame rates of the current Bayers? Again, given the history, this seems doubtful.

So with low light and speed out of the equation, whats left, detail and color rendition.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors? Would the advantage in detail make up for the shortcoming?

Depends on what is meant by "detail", for which there are many definitions - mpstly subjective and vague.

Some time ago I compared my SD9 versus my G9. Based on MTF at Nyquist, the Foveon was quite superior ...

The remaining design [criterion], is color. Would Sigma's color rendition be enough for people to buy it?

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

At this point, fanboys aside, the fact that we are still discussing this seems a bit absurd to me, so why did I start this thread lol?.

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Scottelly
Scottelly Forum Pro • Posts: 18,026
Re: What would the FFF have to do in order to be competative?
1

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

We don't know.

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Agreed.

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP).

Ummm . . . my Quattro made great OOC jpegs, so no . . . not afterwards - no more than CFA cameras require extensive image processing afterwards.

Will the FFF shoot at the frame rates of the current Bayers?

Probably not.

Again, given the history, this seems doubtful.

So with low light and speed out of the equation, whats left, detail and color rendition.

I'm very interested to see how the detail capture works out, when compared to Sigma's fp L . . . and I'm sure Sigma, being the company that makes the highest-resolution L mount camera, is well aware of the challenges the FFF faces.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors?

How do the 45 MP Bayer cameras stack up against the 60 MP plus Bayer sensors? Those cameras still sell, even though the Sony cameras outresolve them. Some people don't need or want more than 20 MP, believe it or not.

Would the advantage in detail make up for the shortcoming?

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

For some people, yes.

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

Where on the horizon? Sony just rehashed their 60 MP sensor into a new A7r V body. My guess is that they might create a stacked version of that sensor at some point, so they can make a camera that can do 8Kp60 video, but 60 MP is not 100 MP. Neither Nikon or Canon have stepped up past 45 MP to match Sony's 60 MP.

At this point, fanboys aside, the fact that we are still discussing this seems a bit absurd to me, so why did I start this thread lol?.

You're asking quite a lot of questions, and most of those could open a full can of worms.

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xpatUSA
xpatUSA Forum Pro • Posts: 23,016
Re: What would the FFF have to do in order to be competative?

Scottelly wrote:

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

We don't know.

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Agreed.

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP).

Ummm . . . my Quattro made great OOC jpegs, so no . . . not afterwards - no more than CFA cameras require extensive image processing afterwards.

Will the FFF shoot at the frame rates of the current Bayers?

Probably not.

Again, given the history, this seems doubtful.

So with low light and speed out of the equation, whats left, detail and color rendition.

I'm very interested to see how the detail capture works out, when compared to Sigma's fp L . . . and I'm sure Sigma, being the company that makes the highest-resolution L mount camera, is well aware of the challenges the FFF faces.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors?

How do the 45 MP Bayer cameras stack up against the 60 MP plus Bayer sensors? Those cameras still sell, even though the Sony cameras outresolve them. Some people don't need or want more than 20 MP, believe it or not.

Would the advantage in detail make up for the shortcoming?

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

For some people, yes.

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

Where on the horizon? Sony just rehashed their 60 MP sensor into a new A7r V body. My guess is that they might create a stacked version of that sensor at some point, so they can make a camera that can do 8Kp60 video, but 60 MP is not 100 MP. Neither Nikon or Canon have stepped up past 45 MP to match Sony's 60 MP.

And the geometric resolution of 60MP is only 15% more than 45MP ...

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Scottelly
Scottelly Forum Pro • Posts: 18,026
Re: What would the FFF have to do in order to be competative?

xpatUSA wrote:

Scottelly wrote:

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

We don't know.

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Agreed.

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP).

Ummm . . . my Quattro made great OOC jpegs, so no . . . not afterwards - no more than CFA cameras require extensive image processing afterwards.

Will the FFF shoot at the frame rates of the current Bayers?

Probably not.

Again, given the history, this seems doubtful.

So with low light and speed out of the equation, whats left, detail and color rendition.

I'm very interested to see how the detail capture works out, when compared to Sigma's fp L . . . and I'm sure Sigma, being the company that makes the highest-resolution L mount camera, is well aware of the challenges the FFF faces.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors?

How do the 45 MP Bayer cameras stack up against the 60 MP plus Bayer sensors? Those cameras still sell, even though the Sony cameras outresolve them. Some people don't need or want more than 20 MP, believe it or not.

Would the advantage in detail make up for the shortcoming?

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

For some people, yes.

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

Where on the horizon? Sony just rehashed their 60 MP sensor into a new A7r V body. My guess is that they might create a stacked version of that sensor at some point, so they can make a camera that can do 8Kp60 video, but 60 MP is not 100 MP. Neither Nikon or Canon have stepped up past 45 MP to match Sony's 60 MP.

And the geometric resolution of 60MP is only 15% more than 45MP ...

Well, I don't know what "geometric resolution" is Ted, but it really doesn't seem to me like there are a whole lot of people interested in more resolution than what the 60 MP Sony and Sigma cameras offer. Nikon and Canon don't seem to think there's much of a market there. I beg to differ. I believe wholeheartedly in my proposed future  "quatrification" of the 20 MP per layer FFF sensor, making a full-frame Quattro sensor that would have an 80 MP top layer. I think an L mount camera with such a sensor would make the ultimate Quattro camera, and I'm hoping it has IBIS, a fully-articulating rear screen, Wi-Fi, GPS, and can do 8Kp60 video too.

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xpatUSA
xpatUSA Forum Pro • Posts: 23,016
Re: What would the FFF have to do in order to be competative?

Scottelly wrote:

xpatUSA wrote:

Scottelly wrote:

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

We don't know.

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Agreed.

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP).

Ummm . . . my Quattro made great OOC jpegs, so no . . . not afterwards - no more than CFA cameras require extensive image processing afterwards.

Will the FFF shoot at the frame rates of the current Bayers?

Probably not.

Again, given the history, this seems doubtful.

So with low light and speed out of the equation, whats left, detail and color rendition.

I'm very interested to see how the detail capture works out, when compared to Sigma's fp L . . . and I'm sure Sigma, being the company that makes the highest-resolution L mount camera, is well aware of the challenges the FFF faces.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors?

How do the 45 MP Bayer cameras stack up against the 60 MP plus Bayer sensors? Those cameras still sell, even though the Sony cameras outresolve them. Some people don't need or want more than 20 MP, believe it or not.

Would the advantage in detail make up for the shortcoming?

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

For some people, yes.

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

Where on the horizon? Sony just rehashed their 60 MP sensor into a new A7r V body. My guess is that they might create a stacked version of that sensor at some point, so they can make a camera that can do 8Kp60 video, but 60 MP is not 100 MP. Neither Nikon or Canon have stepped up past 45 MP to match Sony's 60 MP.

And the geometric resolution of 60MP is only 15% more than 45MP ...

Well, I don't know what "geometric resolution" is Ted, ...

Sorry, I meant lp/mm either horixontally or vertically, Scott.

but it really doesn't seem to me like there are a whole lot of people interested in more resolution than what the 60 MP Sony and Sigma cameras offer. Nikon and Canon don't seem to think there's much of a market there. I beg to differ. I believe wholeheartedly in my proposed future "quatrification" of the 20 MP per layer FFF sensor, making a full-frame Quattro sensor that would have an 80 MP top layer. I think an L mount camera with such a sensor would make the ultimate Quattro camera, and I'm hoping it has IBIS, a fully-articulating rear screen, Wi-Fi, GPS, and can do 8Kp60 video too.

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victorgv
victorgv Senior Member • Posts: 2,123
Re: What would the FFF have to do in order to be competative?
6

Whatever Kazumi decides there would be quite loud dissatisfied group who would proclaim death of Foveon. Myself i am quite happy with sdqh (was total madness to buy considering my finances) of course i am salivating about FF but unless somebody buys me winning lottery ticket it is not happening for me

Just my 2 cents :-).

Long live Foveon!!

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Peter Slovakia
Peter Slovakia Contributing Member • Posts: 716
Re: What would the FFF have to do in order to be competative?
4

A BAYER type camera will never have such quality photos as FOVEON. The three-layer sensor cannot be fooled .. The 3D look and the details and colors that fall out of it are the best and most beautiful for me .. but cameras with FOVEON chip are difficult to use and image processing, it is necessary to learn how to work with them properly, including proper image processing. The reward is a wonderful photograph.

Peter

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Roger Veteran Member • Posts: 3,293
Re: What would the FFF have to do in order to be competative?

dellaaa wrote:

Hello dellaaa and the Sigma group

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Well, ya we all are.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

Well, my SD1M and SDQ-H meet or exceed most of the Bayer IQ except for the FP. Sigma needs to step up and make a sensor that's better than a 100mp Bayer sensor. A camera that has all the class and style of a Leica M, like the SDQ with an L mount, faster AF, you know the rest.

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Or better

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP).

I like SPP it works excellent for me. I get things right in the camera like the old film days when I shot my Leica M4 and my Olympus M1 OM1 OM2 or Contax

Will the FFF shoot at the frame rates of the current Bayers? Again, given the history, this seems doubtful.

How many images do you need 1 or 50000. One excellent Image or 500000 junk ones? Some old story all the skippies want what they see on YouTube.

So with low light and speed out of the equation, whats left, detail and color rendition.

The Foveon will have all the that. You have to know what you want before you can get it.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors?

Hahahahahahahahah...........Your kidding right? Just the same way the SD series did. My SDQ-H matches my FP-L

Would the advantage in detail make up for the shortcoming?

What short comings? I've shot the Leica M11 it isn't like a new XYZABC camera so what short comings does it have?

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

The FP has the best IQ and color, matching the Leica so I tend to believe the new FFF will have the same color palette. Have you used a FP or SDQ-H???

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

My FP-L match anything the Bayers have right now, so I expect the new Sigma to match the Bayers or exceed them. I can do low light now and I'm not sure what you need a high frame rate for? How high? 50 FPS or more? Really for what?

At this point, fanboys aside, the fact that we are still discussing this seems a bit absurd to me,

Ya it is a little odd, but oh well

so why did I start this thread lol?.

Boredom?

I'm waiting for the show in Japan this month to see what happens. I have my escape planned.

Let hope for the best but expect???/

Roger J.

ELSELS Senior Member • Posts: 2,026
Re: What would the FFF have to do in order to be competative?

Roger wrote:

dellaaa wrote:

Hello dellaaa and the Sigma group

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Well, ya we all are.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

Well, my SD1M and SDQ-H meet or exceed most of the Bayer IQ except for the FP. Sigma needs to step up and make a sensor that's better than a 100mp Bayer sensor. A camera that has all the class and style of a Leica M, like the SDQ with an L mount, faster AF, you know the rest.

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Or better

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP).

I like SPP it works excellent for me. I get things right in the camera like the old film days when I shot my Leica M4 and my Olympus M1 OM1 OM2 or Contax

Will the FFF shoot at the frame rates of the current Bayers? Again, given the history, this seems doubtful.

How many images do you need 1 or 50000. One excellent Image or 500000 junk ones? Some old story all the skippies want what they see on YouTube.

So with low light and speed out of the equation, whats left, detail and color rendition.

The Foveon will have all the that. You have to know what you want before you can get it.

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors?

Hahahahahahahahah...........Your kidding right? Just the same way the SD series did. My SDQ-H matches my FP-L

Would the advantage in detail make up for the shortcoming?

What short comings? I've shot the Leica M11 it isn't like a new XYZABC camera so what short comings does it have?

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

The FP has the best IQ and color, matching the Leica so I tend to believe the new FFF will have the same color palette. Have you used a FP or SDQ-H???

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

My FP-L match anything the Bayers have right now, so I expect the new Sigma to match the Bayers or exceed them. I can do low light now and I'm not sure what you need a high frame rate for? How high? 50 FPS or more? Really for what?

At this point, fanboys aside, the fact that we are still discussing this seems a bit absurd to me,

Ya it is a little odd, but oh well

so why did I start this thread lol?.

Boredom?

I'm waiting for the show in Japan this month to see what happens. I have my escape planned.

Let hope for the best but expect???/

Roger J.

Roger J.  -- Please check your PM?

Jozef M Senior Member • Posts: 2,198
Re: What would the FFF have to do in order to be competative?
1

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Yes, that was my point, Yes, is it rational to still release such a camera, with such a large Bayer sensor competition?

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

For me personally, the FFF camera should have a usable iso1600, resolution is not that important, pricing is crucial though, is the camera too expensive then it is not going to sell.
Certainly not to me.

Jozef.

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mike earussi Veteran Member • Posts: 9,440
Re: What would the FFF have to do in order to be competative?
3

The only advantage the Foveon chip has over a Bayer chip is its ability to differentiate more colors (though this does not necessarily mean it's color is more accurate). Even using pixel shift the Bayer chip is still slightly inferior due to the limitation of its color filters.

Foveon will never be able to match Bayer in DR, speed of processing and high iso so the only other avenue to compete on is resolution. A 80mp Quattro Foveon would be able to match the resolution of a 100mp Bayer, which would appeal to some photographers who specialize in landscapes.

The question is price. Can a 80mp Quattro be produced at a price competitive to a 100mp Bayer and can Sigma sell enough of them to at least pay for its engineering costs?

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hikerdoc Veteran Member • Posts: 3,513
Re: What would the FFF have to do in order to be competative?

The definition of competitive probably has answers that vary widely by responder. Some will define it as competitive just by its existence, some by actual sale volume or movement in market share (think graphs and pie charts), some by individual perceptions of some unmeasurable mystical qualities (think word salad with liberal use of adjectives), some by a set of precisely measured parameters (think engineering and physics terms and recognized scientific units).

SigmaChrome Forum Pro • Posts: 15,728
Re: What would the FFF have to do in order to be competative?
4

It seems to be a difficult question to answer in these times with massively high resolution Bayer sensors in FF and MF cameras. People seem to have lost sight of the essential calling of the Foveon sensor -- rich, glorious colour and no colour moiré. This comes with the burden of poor low light performance at high ISO values and low-ish DR. Therefore you have to work hard to get the most out of your Foveon camera.

The following photo was shot on a 50MP medium format camera. I'm guessing you can spot a problem that simply wouldn't occur with a Sigma-Foveon camera.

Look at the waistcoat pattern.

The photo below was shot with a Sigma dp0 Quattro:

A SFD image made up of 7 frames shot at ISO 100 using ND, GND and CPL filters. This competes very well with the 102MP Fujifilm GFX 100S. I can't say it matches it but it comes very close indeed, and the colour is amazing.

The amount of work required to produce this type of image is quite demanding, but the results do make up for it in the end.

I really don't know enough about the technology to say how Sigma could produce a better Foveon sensor with a good DR, great colour and better ISO performance, but I do know that a solid and reliable full frame (or better still MF) camera would be a serious contender for landscape, studio and product photographers.

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Vitée
Capture all the light and colour!
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SigmaChrome Forum Pro • Posts: 15,728
Re: What would the FFF have to do in order to be competative?
4

victorgv wrote:

Whatever Kazumi decides there would be quite loud dissatisfied group who would proclaim death of Foveon. Myself i am quite happy with sdqh (was total madness to buy considering my finances) of course i am salivating about FF but unless somebody buys me winning lottery ticket it is not happening for me

Just my 2 cents :-).

Long live Foveon!!

- Kazuto -

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Vitée
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Peter Slovakia
Peter Slovakia Contributing Member • Posts: 716
Re: What would the FFF have to do in order to be competative?
2

Very well said, Vitée .. that's how it is in my mind too.I am simply delighted with the FOVEON chip and (according to my 30 years of experience) nothing compares to its result, these are unnecessary polemics, as I wrote before, cameras with the FOVEON chip are more difficult to use and image processing, it is necessary to learn how to work with them correctly, including proper image processing (however, the noise is easily removed). The reward is a wonderful photograph. Who look for flaws in the FOVEON system will always find them, then you need to buy something else to take pictures, that's everyone's right. At the same time, you don't have to forget what an imperfect world we live in, there is nothing perfect here and never will be.

Peter

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dellaaa
OP dellaaa Senior Member • Posts: 1,201
My point exactly

Without an end goal in site, i.e. better resolution at all costs, the FFF has no direction and no goal to achieve.  This point was missed by everyone.  Oh well.

There is just so far a logical discussion can go, after awhile, emotions take over as they always do.

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dellaaa
OP dellaaa Senior Member • Posts: 1,201
Re: What would the FFF have to do in order to be competative?

An 80M FFF can't just match the resolution of a 100M Bayer because it looses on speed and low light, hence the point of my initial post.  Why buy a camera that only matches the resolution I get with a 100 M Bayer when it will be slower and have poorer low light performance?

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mike earussi Veteran Member • Posts: 9,440
Re: What would the FFF have to do in order to be competative?
3

dellaaa wrote:

An 80M FFF can't just match the resolution of a 100M Bayer because it looses on speed and low light, hence the point of my initial post. Why buy a camera that only matches the resolution I get with a 100 M Bayer when it will be slower and have poorer low light performance?

Because you'll still have the ability to differentiate more colors. Also Foveon has the 3D look that Bayer can't match. I'd buy one if I can afford it.

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Re: What would the FFF have to do in order to be competative?
4

dellaaa wrote:

Reading a recent post that included a 60M pixel Bayer sensor shot, the the discussion turned into a debate as to whether the FFF would ever arrive.

Looking at the Bayer photo what do you believe the FFF sensor would have to do better than the current generation of Bayer sensors? What are the design criteria the FFF design team have?

I don't know but given the physics of the design and the past Foveons, low light performance would most likely not be on par with the Bayer, agreed?

Foveon has three photodiodes per pixel, none with correlated double sampling. This means very high read noise which means high noise floor which mean poor performance in areas with little light. This means poor low light performance and relatively low dynamic range.

The issue with read noise can not really be solved - there will naturally be more photodiodes, but also CDS is quite impossible to achieve with this kind of design. Some fancy non-destructive multiple sampling might be possible but it would not only slow things down even more, but also not be as effective.

From QE point of view the advantage of Foveon is not having colour filter array blocking light, but on the other hand there is plenty of dead space between the photodiodes. I'd guess one might be able to achieve slightly larger QE with Foveon which would help somewhat in low light situations, but not with the noise floor itself.

Historically, Sigmas have required extensive image processing both while taking the shot and afterwords (SPP). Will the FFF shoot at the frame rates of the current Bayers? Again, given the history, this seems doubtful.

Foveon's problem is the very poor color separation. In principle this could be helped by placing narrow band color filters on top of the sensor, but then some wavelengths would be totally lost and could cause some interesting artifacts.

To get decent color out of Foveon the processing indeed will be rather strong - this increases noise for color photography.

So with low light and speed out of the equation, whats left, detail and color rendition.

The main advantage is reduction in false color artifacts (e.g. moiré). This advantage goes away once diffraction (and lens deficiencies) does anti-aliasing, but it's still a long way from today.

Detail situtation has many variables, but regardless of them lots and lots of pixels would be needed in this hypotetical FFF to compete.

Color accuracy is vastly better on conventional sensors. That's why the CFA is there for.

Foveon type multi layer system might work better in the future with different materials, maybe organic materials or perovskites. Plenty of perovskite developement is being done due to their potential for solar cells and at least one multilayer demonstration does exists (with hideous image quality). Maybe 15 years from now?

As for detail, how would the specs of the proposed FFF stack up against the 60M plus Bayer sensors? Would the advantage in detail make up for the shortcoming?

No. You need likely something like 70% of the pixel count to match conventional sensors, maybe more nowdays as AI-based demosaicing is on its way. This also diminishes the false color advantage.

Anyhow, as even 10MP is enough for very large prints...

The remaining design criteria, is color. Would Sigma's color rendition be enough for people to buy it?

Some like it's different colors and I'm sure many fans would buy because of them, but as the colors can be very problematic and lack in accuracy and because the conventional cameras are not exactly lacking in color accuracy, it's hard to see how the general public would get interested in this.

I don't know and would like rational, opinions as just what will the FFF bring to the table, and why any non L mount people in 2023 would buy it when 100M pixel Bayers are on the horizon that take great low light picture at high frame rates.

At this point, fanboys aside, the fact that we are still discussing this seems a bit absurd to me, so why did I start this thread lol?.

Foveon is very interesting concept and I'm happy it was brought to life. But it feels more like a hobby project, a niche project for those who desire something different. There aren't really any advantages over conventional sensors while the drawbacks may cause issues.

I hope a FF Foveon does see the light of day, but not only I'm not holding my breath, I'd expect the product to be a very low volume very high price item.

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