D4 dxomark result is here

Started Mar 20, 2012 | Discussions
KLO82
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D4 dxomark result is here
Mar 20, 2012
Nikon D4
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ssmumich00
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Re: D4 dxomark result is here
In reply to KLO82, Mar 20, 2012

The D7000 still bests it for Landscape shots?!?!

Interesting read, thanks!
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commiebiker
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Nikon D4: The best Full-Frame overall score ever measured on DxOMark
In reply to KLO82, Mar 20, 2012

that's a nice way to start a review

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Horshack
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DxoMark site is down, so my prediciton was correct..
In reply to KLO82, Mar 20, 2012
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sebastian73
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Re: DxoMark site is down, so my prediciton was correct..
In reply to Horshack, Mar 20, 2012

Horshack wrote:

http://forums.dpreview.com/forums/read.asp?forum=1021&message=40815405

lol good prediction
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mattr
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Re: DxoMark site is down, so my prediciton was correct..
In reply to Horshack, Mar 20, 2012

Horshack wrote:

http://forums.dpreview.com/forums/read.asp?forum=1021&message=40815405

You are a genius!

Could you now please predict when I will receive my D800?

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DSPographer
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Re: D4 dxomark sensor parameters
In reply to KLO82, Mar 20, 2012

This data shows significant improvement in the sensor performance from the D3s. For base ISO the full well increased from 84000 e- to 118000 e- while the noise decreased from 26.0 e- to 18.8 e- resulting about a 1 stop increase in base ISO DR. The per pixel read noise at high ISO also improved from about 3.5 e- to about 2.5 e- : but instead of using all that improvement to lower read noise per area, Nikon used some of it to increase the pixel count.

  • Sensor Paramaters Derived From DXOmark.com Data *

ISO: Manufacturers ISO rating
m: Pixel saturation count in electrons
n: Pixel read noise in electrons
g%: Standard deviation of gain error in percent

res: Worst case difference between fitted SNR curve in dB and SNR data points in dB

NikonD4
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400 204800
m = 118339 60724 29881 14349 7058 3571 1754 912 529 264 125 55
n = 18.83 10.14 5.98 3.39 2.27 2.55 2.41 2.62 2.78 2.67 2.70 1.82
g% = 0.31 0.33 0.35 0.31 0.20 0.00 -0.00 0.57 0.00 0.00 0.00 0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

NikonD3s
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400
m = 84203 80184 40167 19916 10233 4981 2474 1222 745 367 177
n = 25.96 24.21 12.74 7.39 5.36 3.72 3.52 3.45 3.23 3.03 2.82
g% = 0.37 0.32 0.34 0.37 0.44 0.39 0.48 0.35 0.50 0.00 -0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

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KLO82
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Re: D4 dxomark sensor parameters
In reply to DSPographer, Mar 20, 2012

Thanks for your analysis, but D3S does not have ISO 100, right?

DSPographer wrote:

This data shows significant improvement in the sensor performance. For base ISO the full well increased from 84000 e- to 118000 e- while the noise decreased from 26.0 e- to 18.8 e- resulting in a big increase in base ISO DR. The per pixel read noise at high ISO also improved from about 3.5 e- to about 2.5 e- : but instead of using all that improvement to lower read noise per area, Nikon used some of it to increase the pixel count.

  • Sensor Paramaters Derived From DXOmark.com Data *

ISO: Manufacturers ISO rating
m: Pixel saturation count in electrons
n: Pixel read noise in electrons
g%: Standard deviation of gain error in percent

res: Worst case difference between fitted SNR curve in dB and SNR data points in dB

NikonD4
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400 204800
m = 118339 60724 29881 14349 7058 3571 1754 912 529 264 125 55
n = 18.83 10.14 5.98 3.39 2.27 2.55 2.41 2.62 2.78 2.67 2.70 1.82
g% = 0.31 0.33 0.35 0.31 0.20 0.00 -0.00 0.57 0.00 0.00 0.00 0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

NikonD3s
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400
m = 84203 80184 40167 19916 10233 4981 2474 1222 745 367 177
n = 25.96 24.21 12.74 7.39 5.36 3.72 3.52 3.45 3.23 3.03 2.82
g% = 0.37 0.32 0.34 0.37 0.44 0.39 0.48 0.35 0.50 0.00 -0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

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DSPographer
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Re: D4 dxomark sensor parameters
In reply to KLO82, Mar 20, 2012

The DXOmark D3s data shows ISO 100 as having slightly higher saturation than ISO 200. So from the DXOmark data you could say that ISO 100 is really equivalent to ISO 190.

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knickerhawk
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Re: DxoMark site is down, so my prediciton was correct..
In reply to mattr, Mar 20, 2012

mattr wrote:

Horshack wrote:

http://forums.dpreview.com/forums/read.asp?forum=1021&message=40815405

You are a genius!

Could you now please predict when I will receive my D800?

Screw that! Please predict the winning numbers for this week's Mega Millions lottery. It's up to $240 million!

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Horshack
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Full D4 vs D3s SNR ISO 12,800 comparison
In reply to KLO82, Mar 20, 2012

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rhlpetrus
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Re: Full D4 vs D3s SNR ISO 12,800 comparison
In reply to Horshack, Mar 20, 2012

One has to take into account the margin of error of these measurements, including sample variation, then SNR is a very close tie, actually, just like Marianne predicted. DR is not, as we have been seen from Bill's data.

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Horshack
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D4 vs D3s color sensitivity
In reply to KLO82, Mar 20, 2012

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perhort
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Re: Full D4 vs D3s SNR ISO 12,800 comparison
In reply to rhlpetrus, Mar 20, 2012

Really nice to see how the dynamic range lingers so that between iso 100 and 1600 there is a drop of just one stop!

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KnightPhoto2
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Re: D4 dxomark sensor parameters
In reply to DSPographer, Mar 20, 2012

DSPographer wrote:

This data shows significant improvement in the sensor performance from the D3s. For base ISO the full well increased from 84000 e- to 118000 e- while the noise decreased from 26.0 e- to 18.8 e- resulting about a 1 stop increase in base ISO DR. The per pixel read noise at high ISO also improved from about 3.5 e- to about 2.5 e- : but instead of using all that improvement to lower read noise per area, Nikon used some of it to increase the pixel count.

  • Sensor Paramaters Derived From DXOmark.com Data *

ISO: Manufacturers ISO rating
m: Pixel saturation count in electrons
n: Pixel read noise in electrons
g%: Standard deviation of gain error in percent

res: Worst case difference between fitted SNR curve in dB and SNR data points in dB

NikonD4
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400 204800
m = 118339 60724 29881 14349 7058 3571 1754 912 529 264 125 55
n = 18.83 10.14 5.98 3.39 2.27 2.55 2.41 2.62 2.78 2.67 2.70 1.82
g% = 0.31 0.33 0.35 0.31 0.20 0.00 -0.00 0.57 0.00 0.00 0.00 0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

NikonD3s
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400
m = 84203 80184 40167 19916 10233 4981 2474 1222 745 367 177
n = 25.96 24.21 12.74 7.39 5.36 3.72 3.52 3.45 3.23 3.03 2.82
g% = 0.37 0.32 0.34 0.37 0.44 0.39 0.48 0.35 0.50 0.00 -0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Thank you for that analysis!

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rhlpetrus
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Re: D4 vs D3s color sensitivity
In reply to Horshack, Mar 20, 2012

I don't see much difference, it's all within measurement margins of error + sample variance. COncluding from the data, it looks like only DR one has a significative difference, in favor of D4, all the rest is a tie, which is a good thing.
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perhort
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Re: D4 vs D3s color sensitivity
In reply to rhlpetrus, Mar 20, 2012

In my view, Nikon did the right thing. Low-light performance was already insanely good with the D3s. What was needed was more dynamic range for high contrast conditions. Hence the more "balanced" approach. It will now be interesting to see what the 1DX can do. If the D4 is one stop better in DR then perhaps only the London rain will be able to save Canon at the Olympics :-).

rhlpetrus wrote:

I don't see much difference, it's all within measurement margins of error + sample variance. COncluding from the data, it looks like only DR one has a significative difference, in favor of D4, all the rest is a tie, which is a good thing.
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Good shooting and good luck
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bobn2
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Re: D4 dxomark sensor parameters
In reply to DSPographer, Mar 20, 2012

DSPographer wrote:

This data shows significant improvement in the sensor performance from the D3s. For base ISO the full well increased from 84000 e- to 118000 e- while the noise decreased from 26.0 e- to 18.8 e- resulting about a 1 stop increase in base ISO DR. The per pixel read noise at high ISO also improved from about 3.5 e- to about 2.5 e- : but instead of using all that improvement to lower read noise per area, Nikon used some of it to increase the pixel count.

  • Sensor Paramaters Derived From DXOmark.com Data *

ISO: Manufacturers ISO rating
m: Pixel saturation count in electrons
n: Pixel read noise in electrons
g%: Standard deviation of gain error in percent

res: Worst case difference between fitted SNR curve in dB and SNR data points in dB

NikonD4
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400 204800
m = 118339 60724 29881 14349 7058 3571 1754 912 529 264 125 55
n = 18.83 10.14 5.98 3.39 2.27 2.55 2.41 2.62 2.78 2.67 2.70 1.82
g% = 0.31 0.33 0.35 0.31 0.20 0.00 -0.00 0.57 0.00 0.00 0.00 0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

NikonD3s
ISO: 100 200 400 800 1600 3200 6400 12800 25600 51200 102400
m = 84203 80184 40167 19916 10233 4981 2474 1222 745 367 177
n = 25.96 24.21 12.74 7.39 5.36 3.72 3.52 3.45 3.23 3.03 2.82
g% = 0.37 0.32 0.34 0.37 0.44 0.39 0.48 0.35 0.50 0.00 -0.00
res= 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

I just did the sensorgen run for D4
http://www.sensorgen.info/NikonD4.html
Pretty much the same as yours (not surprising, it uses your method)
--
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bobn2
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Re: D4 dxomark sensor parameters
In reply to DSPographer, Mar 20, 2012

DSPographer wrote:

The per pixel read noise at high ISO also improved from about 3.5 e- to about 2.5 e- : but instead of using all that improvement to lower read noise per area, Nikon used some of it to increase the pixel count.

Rather, Nikon obtained that improvement by scaling down the pixel. Under strict scaling, read noise reduces with pixel area. 3.5x(7.21²)/(8.4²)=2.5. Not a coincidence.

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DSPographer
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Re: D4 dxomark sensor parameters
In reply to bobn2, Mar 20, 2012

bobn2 wrote:

DSPographer wrote:

The per pixel read noise at high ISO also improved from about 3.5 e- to about 2.5 e- : but instead of using all that improvement to lower read noise per area, Nikon used some of it to increase the pixel count.

Rather, Nikon obtained that improvement by scaling down the pixel. Under strict scaling, read noise reduces with pixel area. 3.5x(7.21²)/(8.4²)=2.5. Not a coincidence.

But they could have kept the same active area with the new smaller source follower transistor. That would have kept the new lower read noise in e- now over the larger pixel but raised the minimum ISO setting and of course left the pixel count at the old 12 MP value. I think they made the right choice to keep high ISO performance the same because the result is they get a bigger increase in base ISO SNR and DR along with more resolution instead of a tiny reduction in noise for the deepest high ISO shadows.

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