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EOS Bodies - For Stills / Re: My never ending Focus woes with my 5DMK3
« on: January 12, 2013, 02:09:14 PM »
There's a very good video on B&H Learn in Depth on Canon AF. It comes in 3 parts.
http://www.bhphotovideo.com/indepth/photography/tips-solutions/look-canon-autofocus-system-part-1
It explained to me what each Focus points looks for & what is special about Cross-type points. How to use servo etc
I think the problem is that the car has no contrast points for the AF to lock on to. Or more specifically aiming all the focus points at the car is not the right way. You have to aim one of the little boxes at a point with contrast that contains either a horizontal or vertical line.
Plus you have to give the AF system a moment to focus & lock the target.
http://www.bhphotovideo.com/indepth/photography/tips-solutions/look-canon-autofocus-system-part-1
It explained to me what each Focus points looks for & what is special about Cross-type points. How to use servo etc
I think the problem is that the car has no contrast points for the AF to lock on to. Or more specifically aiming all the focus points at the car is not the right way. You have to aim one of the little boxes at a point with contrast that contains either a horizontal or vertical line.
Plus you have to give the AF system a moment to focus & lock the target.