Pascal Parvex
Well-known member
The 14.7 Megapixel cameras have been out for quite a while. When will the next generation of CCD sensors come?
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--The 14.7 Megapixel cameras have been out for quite a while. When will the next generation of CCD sensors come?
FalseI would speculate that 14.7 is it. There's no reason for going any higher since you can't really get anymore detail.
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Exactly, I'm so tired of the megapixel bashing.Image quality from the Canon G11 is decidedly inferior to the G10 except at high ISO. All things being equal, more megapixels means higher resolution, it is not just a amrketing ploy.
It is not just coincidence that the best IQ from FF, APSC, and compact cameras comes from sensors with the highest number of pixels. Of course all other factors need to be taken into account such as the associated electronics and lenses, but you cannot extract detail from a RAW file or JPEG unless it is there in the first place.
While I would agree with you on the second part (and even go so far as to say 10-12MP was sufficient), I have to disagree with you on the first part. Mainly because the manufacturers will need to sell something new to the buying public and more MP seems to rate high in the minds of consumers. Witness the OP's question.I would speculate that 14.7 is it. There's no reason for going any higher since you can't really get anymore detail.
What I said is true...you cannot get more detail.False
Well you got me there...if a features sells then I guess you just keep selling it.While I would agree with you on the second part (and even go so far as to say 10-12MP was sufficient), I have to disagree with you on the first part. Mainly because the manufacturers will need to sell something new to the buying public and more MP seems to rate high in the minds of consumers.
No. Image quality was increasing as the pixel count increased, up to the G10. The G11 took it to another level with lower read noise mainly through higher QE. The first implementation of lower noise technology always starts out with slightly bigger pixels, and then later gets miniaturized. Look at the 5D2 - it was a leap forward for Canon in high-ISO performance, better than the 30D at the pixel level with the same size pixels, and less noise per unit of sensor area than the 50D, but then the 7D comes along with smaller pixels, and as good or slightly better than the 5D2 per unit of area. There will most likely be 18MP 1/1.7" sensors with less than, or the same image-level read noise as, the G10, in the future. Read noise doesn't have to exist at all, as cameras start counting photons instead of digitizing charges.Folk who are mesmerized by the number of Mega-pixels should reflect on the fact that Canon reduced the number of sensor pixels in their latest compact G series camera - this was not a mistake or cost cutting exercise but an attempt to regain better image quality.
This is not quite what they've done (or at least, what Sony did when they designed the sensor). What appears to have happened, from reading the sensor specs, is that an oversize pixel has been used for the size of read transistor. The effect of this is to make the sensor more 'sensitive', i.e. it produces a larger output for a given exposure, or, thinking of it another way, it's base ISO is higher. The higher base ISO gives better performance at higher ISO's. This is a similar trick to the one Nikon pulled off withe the D3, to give their not-quite-as-good sensor tech better performance at high ISO's than its Canon competitors. The downside to this trick is that the sensor cannot collect the same absolute number of photons, so it cuts DR at low ISO's. For the D3, this didn't matter a lot, since a FF camera has DR in hand. For a compact it is more of an issue, and the G11 is noticeably inferior to the G10 at low ISO's, according to DPR's tests.Folk who are mesmerized by the number of Mega-pixels should reflect on the fact that Canon reduced the number of sensor pixels in their latest compact G series camera - this was not a mistake or cost cutting exercise but an attempt to regain better image quality.
Although you are certainly getting into the "law" of diminishing returns, it is incorrect to think that you do not get more detail just because a pixel is the same size as an Airy disc.What I said is true...you cannot get more detail.False
That's not to say that having more pixels doesn't do other things for you. More pixels should help with aliasing and false color. But more detail? No.
Consider the G10. With a pixel pitch of 1.7um, it's just barely diffraction limited at f/2.8 with an Airy Disk of 3.8um. So it is impossible to get more detail out of a larger pixel count.
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Regards,The 14.7 Megapixel cameras have been out for quite a while. When will the next generation of CCD sensors come?
Yes indeed, and good to see too. I bought the Canon Powershot D10 last year and it has been a lot of fun to use (my gravatar was shot with it). Now if only they would continue the waterproof camera trend AND work on improving the image quality of these cameras.The competition is heating up among waterproof shockproof cameras, and those are pretty useful for beach goers, boaters, and people with very active lifestyles. Plus, they are virtually indestructable, so they make a good camera for a child.
I agree. I might become interested again if a good, tough camera comes out. As it is, I've got a couple of old Canon models here, both 5MP, and more than sufficient for what I use a P&S to do. I had a little Ryobi here for a bit, 8MP, and it was something of a stone ax of a camera, but fairly tough and could produce good photos. It totally lacked a viewfinder, though, and I've spent 60 years using an OVF of one kind or another, so I had trouble with it and passed it on.Yes, at least for compact cameras, this is all marketing hype.
But when they hit the wall with MP, then what comes next?
It's already happening:
Clearly, very few are competing with image quality, because that is the hardest and most expensive way to compete. So they resort to style, fashion, and gimmicks.
- More ways to detect a face. (Smile, Face, Frown, Blink, Intelligent. Smart, etc.)
- More in camera editing. (Art Filters, Magic Filters, etc.)
- Robo Cameras, like that (Sony Party Shot)
- Cameras that come in 400 color combinations (Pentax Kx)
- Cameras with front LCDs (Samsung TL220)
- Cameras that project images (Nikon S1000)
While all of the above are essentially useless features for anyone who values image quality, thre is one interesting trend worth noting. The competition is heating up among waterproof shockproof cameras, and those are pretty useful for beach goers, boaters, and people with very active lifestyles. Plus, they are virtually indestructable, so they make a good camera for a child.
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You're right. But if you where to calculate it yourself, or maybe just read what I wrote , you would see that the pixel is half the size of the Airy Disk. At that point you cannot get any more detail.Although you are certainly getting into the "law" of diminishing returns, it is incorrect to think that you do not get more detail just because a pixel is the same size as an Airy disc.What I said is true...you cannot get more detail.False
That's not to say that having more pixels doesn't do other things for you. More pixels should help with aliasing and false color. But more detail? No.
Consider the G10. With a pixel pitch of 1.7um, it's just barely diffraction limited at f/2.8 with an Airy Disk of 3.8um. So it is impossible to get more detail out of a larger pixel count.
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