Quality differences on APS-C cameras?

[Quasimodo]

I have just gotten my 2x III extender and wanted to test out focal lenght. I shot the first four with my 5D II, and then I wanted to see how the 640 effective focal length would be, and I shot the last with my wife's 600D. I notice some color differences. I have been thinking about getting a 7D as a secon camera, but my question is: Is the quality of the 7D versus the 600D large?

[jrista]

I have just gotten my 2x III extender and wanted to test out focal lenght. I shot the first four with my 5D II, and then I wanted to see how the 640 effective focal length would be, and I shot the last with my wife's 600D. I notice some color differences. I have been thinking about getting a 7D as a secon camera, but my question is: Is the quality of the 7D versus the 600D large?

In terms of IQ, you shouldn't see any difference at all, as both cameras use the same sensor. The benefits of the 7D are largely in terms of performance...AF performance, frame rate and continuous shooting, weather sealing, etc. If you don't need better AF, high speed continuous shooting, or weather sealing, I would stick with your 600D.

[Quasimodo]

I have just gotten my 2x III extender and wanted to test out focal lenght. I shot the first four with my 5D II, and then I wanted to see how the 640 effective focal length would be, and I shot the last with my wife's 600D. I notice some color differences. I have been thinking about getting a 7D as a secon camera, but my question is: Is the quality of the 7D versus the 600D large?

In terms of IQ, you shouldn't see any difference at all, as both cameras use the same sensor. The benefits of the 7D are largely in terms of performance...AF performance, frame rate and continuous shooting, weather sealing, etc. If you don't need better AF, high speed continuous shooting, or weather sealing, I would stick with your 600D.

Ok, thanks:)

[Aglet]

In terms of IQ, you shouldn't see any difference at all, as both cameras use the same sensor. The benefits of the 7D are largely in terms of performance...AF performance, frame rate and continuous shooting, weather sealing, etc. If you don't need better AF, high speed continuous shooting, or weather sealing, I would stick with your 600D.

+1,
7D's better AF is not necessarily worth the upgrade cost for many uses and, altho they use similar sensors, I think the 7D's noise levels are not as "nice" as the other 18MP Canon sensors.
E.g. 60D seems to have less of a low iso banding issue compared to 7D and 60D sensor and electronics is likely closer to the 600D than the 7D.