ankorwatt said:
David Hull said:
ankorwatt said:
aj1575 said:
I for my part think that Canon made the switch to a new process with the 70D sensor. Canon admited, that 18MP was the limit with the process they had then. So if they now make an APS-C sensor with 40million photodiodes (there are two diodes that can be read seperatly in every of the 20.2MP), then I think they definitly made the move to a new process.
For those who think that Canon has a problem with high ISO noise, just go over to DXO Mark and check the graphs (not their rubbish ratings, but the real measurments). Take the Nikon D600, Canon 6D and Sony a900; look at the graph, and tell me which camera you would take for low light photography. I think we have a clear winner with the 6D. The 6D looses out in dynamic range at low ISO, and has worse color sensitivity, but DR and SNR are better than the rest at high ISO.
Don't get yourself fooled by the DXOMark Rating, it shows not the whole picture. It is also difficult to judge what a 5 or 10 point difference means exactly.
I'm looking forward to the DXOMark measurments of the 70D; I think we will see some surprises, not that the 70D will storm to the top, but just a different behavior then the recent Canon sensor (which was rather predictable).
if you take a look at all parameters you se that the canons sensors are behind in color depth,DR, and also in high iso.
this is a Toshiba sensor
How does any of this affect a real photograph? Let's just take one of them, colour depth. The difference between 22 and 24 bits is going to be indistinguishable in any type of real world use. Can you show us a photo where this difference is evident?
yes I can, and there are difference between my Canon and Nikon cameras, especially in colors as green.You can also se it in lower levels where Canon can not reproduce the same colors as Nikon.
I have been working with colors, colors reproduction, color profiles since my first scanner in the beginning of the -90
and can invite a color specialist who can easily can explain how the different cameras CFA works and how steep these filters are and what it means, Canons color filter are thinner by the years to gain light which you can se by comparing 1dsmk3 and the 5dmk3 or mk2 .
I don't really need an explanation of how the CFA works; I have been reading that stuff for years. Nor do I need someone to tell me that Nikon and Canon render colors differently, that fact is well known and has also been discussed ad nauseum here and elsewhere.
The reason I responded to your comment is that I continually see people trotting out these DxO numbers claiming that they represent some sort of scathing indictment of Canon technology yet when I look at images produced by each technology, the results are pretty much indistinguishable in terms of IQ. About the only one of these that can be demonstrated in an actual photograph is the oft discussed read noise and that requires some pretty serious “image abuse” to do.
To me, the acid test will be to perform a double blind experiment where several photographers walk through an exhibition of displayed prints and correctly identify which camera shot them. I have never seen this done (or even attempted) but if all of this DxO stuff really carried any real world significance, identifying the superior performing technology in such a test would be a “slam dunk” and… I think we both know that is not going to be the case.
The proof lies in the images themselves, if dramatic differences not evident in the images, then there has to be some question as to the real world relevance of the measurements that are supposed to be indicative of image quality.