Depth of Field on the M43 is in fact better not worse.....

Started May 26, 2012 | Discussions thread
Ron Parr
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Not kidding
In reply to ChrisDM, May 28, 2012

ChrisDM wrote:

Are you kidding? in the world ??? Did you miss the part where the OP states that he wrote this article for the beginner to begin to grasp these concepts as they relate to photography? And you want to nitpick the definition of DOF to that level? He's not writing an scientific optics textbook. Once again it is for the beginner to grasp the concept. And his definition does that just fine, in fact better than yours.

I wasn't kidding when I offered the correct definition of DOF.

His definition is totally wrong in ways that are obvious and could certainly confuse a novice:

  • It states that DOF is a part of the image (area) instead of a depth (linear dimension) despite the fact that the D in DOF means depth.

  • If DOF is an area measured in the image, then DOF is never larger than the size of the image. If you print an image a 4x6 inches, then DOF can be at most 24 square inches no matter what the photograph is of.

What could be more confusing to a beginner than a definition that both refers both to wrong place and to the wrong units? How could a beginner reconcile common statements about DOF extending to infinity with this definition - an infinite sized print?

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