5D Mark III vs 7D - Effective Resolution When Cropping and Noise Reduction Applied

Started Oct 28, 2012 | Discussions thread
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schmegg Veteran Member • Posts: 5,768
Re: 5D Mark III vs 7D - Effective Resolution When Cropping and Noise Reduction Applied
2

kidcharles wrote:

Conclusion:

Based on these results (particularly in light of the non-equivalent ISO mentioned in 1) I have to say that the 5D3 will be able to fully replace my 7D for my bird photography, with the only drawback being the lower FPS rate which I can live with. Field tests showed that the 5D3 autofocus system is at least as good and probably better than the excellent 7D system.

Whilst I agree that the AF on the 5D3 is slightly better than the 5D3 (by a small but noticeable margin), I have not found that the 5D3 can compete with regards to reach.

Here are two test shots showing the difference ...

ISO100 ...

http://img22.imageshack.us/img22/4999/iso100c.jpg

and ISO800 ...

http://imageshack.us/a/img593/3185/iso800.jpg

IF the 5D3 AF works as well at f8 as the 7D AF does, then the difference will be negligible - but that remains to be seen. And the extra 2fps means, for me, the 7D is still the weapon of choice for reach limited action situations.

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