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Message: <blockquote data-quote="GYRob" data-source="post: 1356614" data-attributes="member: 38948">the red squar is smaller than what the focus point covers so at times it will grab something other than what the point is on this happends when a higher contrast subject is prominent just outside the focus point.Yes dof is tiny and even stopping down does not give much extra dof with the 500f4.i really would recomend sorting the micro ajustment out .Rob.</blockquote>