On Sony Nex6 there is the same sensor, as on Sony NEX 5R.
So I compare Sony NEX 5R and the Canon 5D Mark II on high ISO.
I provide the relevant data with DxO.


From these data DxO we see that Sony NEX 5R by one step advances full frame Canon. I.e. DxO believes in a victory of small-sized pixels over large (4.7 microns against 6.4 microns at Canon).

In principle the situation is not difficult and it is easy to reveal the winner, but I will provide also numerical data that it was possible to compare as a percentage.
For dough it was taken the standard gray map of Kodak 18% and it was set perpendicular to a lens axis.
Lighting — pilot light from Broncolor generator.
Shooting was made in RAW for both cameras, Adobe Camera Raw was disconnected. All remaining settings are identical and standard. A parametric curve is linear.
Color temperature 2950K +9 in installations for pictures from both cameras. Nevertheless it is visible that fragments differ on color. As article subject is not a color rendition, I won’t stop on it. We will mark this fact in the future.

— Sony matrix
— the lens Sony E 18-55/3.5-5.6 OSS
— Canon matrix
— lens Canon EF 16-35/2.8L II

The diaphragm is F4 on with cameras. The exposure changed in proportion to compensate change of ISO. Exposure on all frames — is identical, in the converter it wasn’t corrected. Shooting was carried from a tripod.
Focal distance — almost identical, 35mm for 35mm a format.

Numerical calculation of a ratio signal/ image noise
It seems everything is clear. The dynamic range of the camera depends on that, how less image noise it has (noise restricts DR from below) and from that, how much bright light it will be able to transfer, without having lost a detail (it restricts DR on top). And in it we (I and DxO) understand DR equally (they have explanations to this parameter).

Earlier (my previous camera Canon 1D mark II N) with relight there was a big problem and, having overexposed a picture, we lost details. But with Canon 5D Mark II there was a big break in evolution of matrix’s and now I can almost overexpose without serious consequences on 1.5 steps.
If the first problem (overexposure) decided more powerful lead-out of a signal excess from light-sensitive elements, the second problem was much more difficult. The people required resolution and it could be received with reduction of a unit element or with increase in a matrix. Increase in a matrix is very expensive invention and is also fraught with the competition to vendors of cameras. Thus the new line of lenses is required. And it is huge expenses!
Plus it is possible “to swindle” after all. There is a real pixel or not…
Plus in case of unit element reduction the amount of light, became less and for this reason we need elements with higher ratio signal/noise .
The output was found in the Squelch. Very few people can already imagine the digital camera without it. On all digital cameras by default it is switched. Many RAW converters by default include it for RAW that not to baffle you.
If you want to consider noise on your camera, don’t forget to come into the tab of Detail-Noise Reduction and to disconnect all nonsense which is by default there.

It is simpler to lead out excess of a charge from larger light-sensitive element and therefore even the sense special isn’t present to compare in this plan of the Canon 5D Mark II and Sony NEX 5R.
But can some new technologies Sony (and together with Nikon) to achieve the best ratio signal/noise on the matrix’s?
It is quite possible. After all it is enough to deliver more expensive and qualitative light-sensitive elements.

Comparing of sensors: Canon vs Sony

You see 100% crop, therefore they are small. In case of increase they don’t bear any new valuable information and therefore here are provided in the real size.

iso100 canon,sony

ISO 100 Left: Canon 5D mark II, right: Sony NEX 5R

Canon, SNR = 80.51/4.89 = 16.46
Sony SNR = 77.66/4.98 = 15.59
As you can see, the ratio signal/noise is better on iso 100 better at the Canon 5D Mark II
Plus to everything if to look attentive, and to consider 100% crop, there are some small artifacts on a picture fragment with Sony NEX 5R.

ISO 200 Left: Canon 5D mark II, right: Sony NEX 5R

ISO 200 Left: Canon 5D mark II, right: Sony NEX 5R

Canon, SNR = 80,46/5,12 = 15.71
Sony SNR = 77,85/5,52 = 14.10


ISO 400 Left: Canon 5D mark II, right: Sony NEX 5R

Canon, SNR = 82,09/5,67 = 14.48
Sony SNR = 77,12/6,23 = 12.38

ISO 800 Left: Canon 5D mark II, right: Sony NEX 5R

ISO 800 Left: Canon 5D mark II, right: Sony NEX 5R

Canon, SNR = 80,92/6,51 = 12.43
Sony SNR = 76,65/7,61 = 10.07


On all options ISO Canon 5D mark II advances Sony NEX 5R, so it has more than DR inventory. Only on the highest ISO where from the useful signal remains only a small, indications on noise start being aligned (SNR aims to zero).
Here for this reason I don’t recommend to be guided by the sites where there are no process of testing and measurements in “parrots”. DxO also belongs to these sites.
Compare to The-Digital-Picture. I don’t say that there everything is ideal, but at least they yield results — pictures.