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Message: <blockquote data-quote="GYRob" data-source="post: 1726795" data-attributes="member: 38948">its very close Marcus and if the photographer does his/her bit then it would be hard to pick a winner between them, i think the mk3 grabs the focus just a little quicker but this is more of a feeling Mostley because the mk3 is a little more responcive in how it works .That said the 7d is my main birding camera now over the mk3 it just gives so much more reach and has so many more mps , for birds it has to be the best out there . shot from today full frame no pp and crop with ppRob.</blockquote>