Strange auto focus behaviour in 7D

Started Jul 10, 2012 | Discussions thread
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maboleth
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Strange auto focus behaviour in 7D
Jul 10, 2012

Today I went on the beach with 100mm IS L f2.8 lens and 7D and it missed every shot - they were all backfocused even on f8. It drove me crazy.

Then I put +5 on MA and it was better and usually spot-on. However, after few hours I returned home and noticed that +5 MA was bad, I disabled it and it's now focusing ok.

My question is - what happened? It was very hot and humid... can that interfere with the way AF works?

On a personal note - I'm not so fond of 7D's auto focusing and cannot wait to sell it and buy 5d mark3... I always had some kind of weird focusing "issues" with it... I make money with photography and I got used to it, but I find it not that accurate. But today was a complete disaster.

Thanks.

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Canon EOS 5D Mark III Canon EOS 7D
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