DXO claim 1DX2 new class leader

May 26, 2012
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http://www.dxomark.com/Reviews/Canon-EOS-1D-X-Mark-II-sensor-review-New-class-leader

"The Canon performs exceptionally well. Not only does it have a wider useful dynamic range at base and low ISOs than the Nikon, it’s not far behind the Sony, and that small difference won’t be noticed in use. The Canon sensor continues to offer a wide dynamic range at every ISO setting, improving on the Sony from ISO800 onwards, and falling only slightly behind the Nikon’s strong performance from ISO6400 onwards. Indeed, the difference at most is around +0.6EV. Canon cameras are known for high ISO noise performance, and the Mark II surpasses both the Nikon and Sony by nearly +0.5EV.
Conclusion

This is a well-deserved result for Canon, and this versatile sensor should prove attractive to a wide range of photographers, including those that work in multiple disciplines. The wide dynamic range at low ISOs should appeal to all photographers, but especially those using it for landscapes, and the low noise at high ISOs will also appeal to action and sports photographers. Although the new model is aimed primarily at that market, the increase in pixel count over its predecessor now matches that of the earlier EOS-1Ds Mk III, a model that’s still highly regarded for editorial and commercial work. It is not too much of a stretch to view the new EOS-1D X Mk II as the natural successor to that camera, and its wide range of capabilities, including DCI 4K video, make it look highly tempting. Sure, it would have been great to see a higher pixel count, but overall, the sensor performance offers photographers the versatility to tackle a wide range of assignments with just one camera.
"
 
Amazing. Canon and Nikon are tied at 88 each (1Dx M2 and D5)

Looking at the details

Portrait (color depth):
- Canon 1Dx M2 24.1(bits)
- Nikon D5 25.1

Landscape (DR)
- Canon 1Dx m2 13.5 Evs
- Nikon D5 12.3

Sports (Low-Light ISO)
- Canon 1Dx M2 3207 ISO
- Nikon D5 2324 ISO
 
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RGF said:
Amazing. Canon and Nikon are tied at 88 each (1Dx M2 and D5)

Looking at the details

Portrait (color depth):
- Canon 1Dx M2 24.1(bits)
- Nikon D5 25.1

Landscape (DR)
- Canon 1Dx m2 13.5 Evs
- Nikon D5 12.3

Sports (Low-Light ISO)
- Canon 1Dx M2 3207 ISO
- Nikon D5 2324 ISO

Maybe the 1 point difference in color depth equall everything else :)
Amazing Low-Light result
 
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If you dig deeper beyond the single number results, it's obvious, that sensors in both cameras (1DxII and D5) are balanced slightly differently. This my produce equal "Score", which BTW. I really don't give a s.....

What's truly amazing, that the new camera maintains same DR at ISO 1600 as 1DsIII and 1Dx at ISO100! Yet they upped metamerism index from 73 on 1Dx to 81 on 1DxII (still not in the heights of 1DsIII and 1DIII, which both scored 86). The improvement on 1Dx isn't only at base ISO, but goes up to ISO3200!

I still can't understand why Nikon replaced the D4s sensor with D5 sensor...
 
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Azathoth said:
Pff lol who cares, DXO is full of crap...

Agreed. The 1DX was never bad, and the D5 isn't either.

Somehow the 1DX MkII gets the same overall rating as the eight year old D3X?

http://www.dxomark.com/Cameras/Compare/Side-by-side/Canon--EOS-1D-X-Mark-II-versus-Nikon-D3X___1071_485


No one should ever rely on DxO for anything except for their individual graphs that show performance of an individual metric, any score that they have ever assigned to anything is utterly meaningless.
 
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sebasan said:
Maybe the 1 point difference in color depth equall everything else :)
Amazing Low-Light result

Really crudely, from sorting and comparing their ranking tables on different metrics, I roughly peg the following:

  • Each bit of color depth gets you about 4 overall score points
  • Each Ev of higher DR gets you about 2.5 overall score points
  • 300 pts higher on Sports/ISO gets you about 1 more overall score point

Of course, trying to understand DXO's overall score metric is tantamount to hitting oneself in the head with a hammer.

#ibuprofenplease

- A
 
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ahsanford said:
Of course, trying to understand DXO's overall score metric is tantamount to hitting oneself in the head with a hammer.

#ibuprofenplease

- A

I have no doubt that there is no formula. Even worse, there is nothing about DxO that prevents their results from being an extortion tool.
 
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9VIII said:
ahsanford said:
Of course, trying to understand DXO's overall score metric is tantamount to hitting oneself in the head with a hammer.

#ibuprofenplease

- A

I have no doubt that there is no formula.

I've seen an approximation:

DxOMark_Sensor_Score = 59 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663) -0.2
 
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neuroanatomist said:
9VIII said:
ahsanford said:
Of course, trying to understand DXO's overall score metric is tantamount to hitting oneself in the head with a hammer.

#ibuprofenplease

- A

I have no doubt that there is no formula.

I've seen an approximation:

DxOMark_Sensor_Score = 59 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663) -0.2

59-0.2 = 58.8 so shouldn't the eqn be:

DxOMark_Sensor_Score = 58.8 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663)
 
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Taken from the CR homepage...

DXOMark has completed their review of the Canon EOS-1D X Mark II and has given the camera a sensor score of 88. This is the highest score ever for a Canon DSLR.

The thing is though, they haven't completed their review of the 1DX Mark II. They've completed their review of the sensor inside the 1DX Mark II. There's a big difference, and unfortunately an alarming number of people don't understand the difference (not saying CR doesn't, they obviously do). Some think that if the sensor inside of a camera is rated highly it MUST be a better camera than a lower scoring camera (sensor). Really unfortunate that some people are so sheep-ish.
 
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neuroanatomist said:
9VIII said:
ahsanford said:
Of course, trying to understand DXO's overall score metric is tantamount to hitting oneself in the head with a hammer.

#ibuprofenplease

- A

I have no doubt that there is no formula.

I've seen an approximation:

DxOMark_Sensor_Score = 59 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663) -0.2

I thought it's something like:

DxOMark_Sensor_Score = 59 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663) -0.2 + (if Canon) - 3 :P
 
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AlanF said:
neuroanatomist said:
9VIII said:
ahsanford said:
Of course, trying to understand DXO's overall score metric is tantamount to hitting oneself in the head with a hammer.

#ibuprofenplease

- A

I have no doubt that there is no formula.

I've seen an approximation:

DxOMark_Sensor_Score = 59 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663) -0.2

59-0.2 = 58.8 so shouldn't the eqn be:

DxOMark_Sensor_Score = 58.8 + 4.3*(ColorDepth-21.1) + 3.4*(DynamicRange-11.3) + 4.4*log2(ISO/663)

Yes, or there's a missing set of parentheses around a term. Not my formula, found in an article on DxO's website (reposted with permission, the author was not affiliated with them). The same author also suggested that the coefficients for the three sub scores might not be constant across all sensors.
 
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