IQ comparison; or how meaningful is DXO

[aj1575]

Hello, I made a table with different samples from different cameras at different settings. I took the pictures from dpReview, and arranged them in 6 rows with 4 pictures each. The picture in each row are taken with the same setting (ISO, Raw or JPG). The pictures are mainly from Canon or Nikon cameras, but others are also included.

Feel free to rank the pictures in each row, or to just point a interesting things. I will post the picture with the settings and the cameras later.

You should download the picture to see it at 100%

The goal is not to spot the 70D. The idea is to rank the picture according to your impression, and then see later from what cameras they were.

 

[ajfotofilmagem]

Ok, I'll kick:
3A is the Canon 7D
3B is the Nikon D7100
3C is the Sony A77
3D is the Canon 70D
Did I kicked too far? ???

 

[ajfotofilmagem]

Someone else will guess?

 

[JohnUSA]

Here's my picks:

1. D
2. D
3. D
4. A
5. A
6. A

 

[aj1575]

Ok, I'll kick:
3A is the Canon 7D
3B is the Nikon D7100
3C is the Sony A77
3D is the Canon 70D
Did I kicked too far? ???

Mostly Wrong. Try to sort the rows from best to worst, I will post the pic the names on it soon.

 

[aj1575]

I will do a ranking.

1. DCBA
2. DACB
3. DBAC
4. BDCA
5. DCAB
6. DABC

 

[Kristofgss]

Do you mean sort per row or sort once to pick the most pleasing one of the four cameras?

 

[luigig75]

1) DCBA
2) DCAB
3) DBAC
4) DBCA
5) ABCD
6) DABC

 

[aj1575]

Do you mean sort per row or sort once to pick the most pleasing one of the four cameras?

You can also only pick the best and the worst. What I like to do is a blind test; just look at the pictures, without knowing what camera it is, and what the settings were.

It is very interesting. I made the table, but I can remember the position of only a few cameras, so there is nothing else to do than just look carefully at the pitures, and rate them by what I see.

I think I will do a table with only the DXO mark attached to it, this would also be interesting.

 

[Cannon Man]

I spot that they are all bad.. None of them a 1DX

 

[Kristofgss]

1. acbd
2. cabd
3. dbac
4. bcda
5. dcab
6. adbc

 

[Woody]

My ranking:

1 DCBA
2 DACB
3 DBAC
4 BDCA
5 BACD
6 DABC

 

[aj1575]

I like to see some more ratings, so that it makes sense to put the results into some nice graphs.

 

[rpt]

1. DCAB
2. ADCB
3. DABC
4. BDAC
5. ACBD
6. ADBC

There you go...

 

[ajfotofilmagem]

I'll try again. From best to worst ...
1- D- C- A- B-
2- D- A- B- C-
3- D- B- A- C-
4- B- D- A- C-
5- C- A- B- D-
6- D- A- B- C-

 

[Mt Spokane Photography]

DXO measures the sensor characteristics. Those are hard facts. DXO does not test cameras.

For those that understand this, the information can be useful in selecting a camera that has a sensor which meets your special needs.

Unless its a extreme application, the photographer is 90%, the lens is 9.99 % and the body makes little difference to IQ.

Since DXO does not test bodies for other things that may matter to photographers like metering accuracy, their attempting to put a number to a camera body based on sensor testing is of little value to me, but the raw data is valuable.

However, if you are one who needs a particular sensor characteristic, understanding the strengths and weaknesses of your sensor might be important. So far, I have found lenses to be so much more critical, that the sensor makes little or no difference, unless its defective.

 

[Joynt Inspirations]

I'm game.

1. DCBA
2. ADCB
3. DBAC
4. BDCA
5. ACBD
6. DBAC

Fool me once …

 

[hutjeflut]

its just not possible to siply rank them as each row has different pixtures that have different qualitys better like colour sharpness and noise are not always equally good on each shot.

1. D simply beats all the others both in detail and sharpness but on it seems somewhat lower on the exposure side as its a little darker resulting in lower saturation.

2. D and A seem the have about the same iso preformance but A seems to be slightly out of focus and a little flat colour wise while C seems to be best colour wise but had poor details and noise preformance.

3. D is the best on everything here

4. B seems to have the best noise preformance but seeing all the details of the blocks has fallen away this immage on full size will look flat and lack detail so your mostlikely better off with D which had the second best noise preformance but maintains detail.

5. D has the best noise preformance but lacks detail and saturation and contrast making me think C would give the best end result as its luminous noise mostly and has plenty detail and saturation. A has more detail but far worse noise preformance making you lose detail on noise reduction.

6. B has the best colour reproduction and a nice even move from dark to light blue while A as the most detail/sharpness/contrast and D has the best noise preformance.

so depending on what you look for different photos might fit your need best.

 

[aj1575]

its just not possible to siply rank them as each row has different pixtures that have different qualitys better like colour sharpness and noise are not always equally good on each shot.

....

so depending on what you look for different photos might fit your need best.

Thanks, a very nice analysis.

 

[aj1575]

Here is the comparison with the camera models and the settings of the pictures taken.

I leave it to you to judge your results; I will make some kind of statistics later.