Messages

1

EOS Bodies / Re: More Big Megapixel Talk [CR1]

« on: October 04, 2012, 03:53:03 AM »

Guys, no matter what facts you have or what you say it's not going to help much, lol.

I know, I know.  But...the windmill is right there, just sticking straight up out of the field and begging to be tilted at and charged...

Really, the D3x has a 12-bit ADC?  Quick, you'd better call Nobuyoshi Gokyu (President & CEO of Nikon, Inc., but I'm sure you know that) and tell him that the features page for the D3x, which states, "Fast 14-bit A/D conversion incorporated onto the image sensor," is wrong and needs to be corrected immediately, based on your thorough understanding of the read out from Nikon sensors.

So, if we can agree that Nikon is correct about their own D3x specifications, and that you, despite your extensive understanding and studying, are wrong about their D3x specifications, let's just say that the D3x has a 14-bit ADC and move on...

In that case, DxO's measurements show a very decent 12.84 EV of DR for the D3x.  Their 'Landscape Score', however, is an artifically inflated 13.65 EV - still technically possible (unlike the D800), but again, artifically inflated as a direct result of a flawed method of data analysis.

Study the subject, indeed.  Oh, puuullllleeeeeeeze.  It's almost as if I didn't have a day job that includes both analyzing quantitative image analysis data and managing a large group of scientists who do the same... 
[/quote]





Sorry but you are wrong 

D3x sensor is the same as in  the Sony A900, there has been much discussion whether it is a 12 or 14-bit column ADC and if Nikon has changed it  . In  the Sony's sensor is it determined that  is a 12-bit  column ADC.

Whether it's  a 12 or 14 bit ADC in Nikon . In the d3x . D90, d7000, d800 it takes place two readouts of data and these  data are merged so the number of dynamic stops are higher than  the number of stops from a normal read out  to a  common ADC.

With Canons sensor layout it's different . Based on the 18MP APS-C pixel with a very good and very expensive external ADC - probably 16 bit  could give them better "more mega pixel camera " and  DR, if they can deal with the banding. One sensor expert always maintains that they (Canon) could deal with banding by leaving larger areas of masked black pixels (allows them to make the required changes in line by line and column by column gain.

So do not blaim DXO meassurements as incorrect  when  Canon  is showing  poor data  like DR and other meassurable parameters.

2

EOS Bodies / Re: More Big Megapixel Talk [CR1]

« on: October 04, 2012, 02:05:10 AM »

Guys, no matter what facts you have or what you say it's not going to help much, lol.

Well, in this case they must blaime theirs own ignorance regarding multipel read outs and not
DXO meassurements.
Go to sensorgen, there you have all data ,FWC and read out noise



 

3

EOS Bodies / Re: More Big Megapixel Talk [CR1]

« on: October 03, 2012, 05:40:02 PM »

Sorry, then you do not understand the read outs from Nikon and the Sony sensors , and  it is more than one  data reading.
Even the D3x with 12 bit ADC have more than 12 stops DR because of more than one data reading
Study the subject before pre mature conclusions

4

EOS Bodies / Re: More Big Megapixel Talk [CR1]

« on: October 03, 2012, 10:24:02 AM »

As I new member  find  comments here  about DxOmark disappointing , just because  some of you do not understand them, and they produce a result you don't like, is no reason to accuse them of not being reliable. Maybe you should seek to understand what they measure before you damn it.

It's not they are not understood. Their derived data are just plain wrong sometimes while their RAW data is fine.

Explain

5

EOS Bodies / Re: Canon 5D3 vs. Nikon D600

« on: October 03, 2012, 07:28:02 AM »

I think that it has just taken time for the better sensors to get into camera models that actually get attention: D800 & D600.

Three years ago, the D7000's APS-C sensor was way 'better' than it's competitor, the 7D (in DxOMark-land).  Which was more popular?

Yes, which one was it , I have not seen any soner SRL figures then this.
Photoscala has posted an interesting Gain & Loss analysis of the worldwide DSLR market, for the period 2006-2008. According to their findings Canon, who were the undisputed worldwide leaders in 2006, have lost 9 percentage points and barely managed to keep their number one position against Nikon, who have gained 4 percentage points in the meantime. The biggest winner is Sony, who managed to more than double their market share, and took the third position from Olympus with ease. The rest of the market is devoid of any major changes, although Panasonic has managed to double its share, partially owing to its introduction of the DMC-G1 (which is, technically speaking, not a DSLR, but is nevertheless included in the figures). Nota bene: Photoscala warns that these numbers, which were derived from multiple sources, are to be taken with a grain of salt, but allegedly “the tendencies have been captured quite accurately”.

6

EOS Bodies / Re: More Big Megapixel Talk [CR1]

« on: October 03, 2012, 06:36:58 AM »

As I new member  find  comments here  about DxOmark disappointing , just because  some of you do not understand them, and they produce a result you don't like, is no reason to accuse them of not being reliable. Maybe you should seek to understand what they measure before you damn it.