Mike K Offline Upload & Sell: Off
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Norman my love wrote:
When I hold the shutter down on my 5D II, it will re-focus, and the re-focus is out of focus. I wonder if I change to back button focus, if the problem will go away.
Yes, back button focus will help
"If you are shooting something like a series of portraits of a person, and you want them composed off-center, back-button AF makes it super-easy to take as many pictures as you want. Focus on your subject by pressing the rear button (more on which button later in this article). Once in-focus, take your thumb off the rear button. Re-compose the shot to move your subject off-center. Shoot as many pictures as you like. With focus activation removed from the shutter button, you now can fire any time you like, and remove your index finger from the shutter button after a shot is taken. No matter what, the camera makes no effort to re-focus when you press the shutter button half-way down again."
descriptions for various Canon models on Page 3 of this Canon tutorial
http://learn.usa.canon.com/resources/articles/2011/backbutton_af_article.shtml?categoryId=121
Mike K
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