Archived posting to the Leica Users Group, 1999/09/12

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Subject: Re: [Leica] depth of focus
From: Kevin H <kevin@2image.com>
Date: Sun, 12 Sep 1999 17:07:59 -0700

Bill,
Having been a student, I think you will confuse your students by using 'depth of
focus'  for depth of field.  I think students can grasp the 'depth of field'
concept, and if this is a new term for them, isn't that what 'teaching' is
about?  Keep 'depth of focus' in the camera.

Bill Larsen wrote:

> Henry Ambrose writes:
>
> |So hows this for a statement using "depth of focus" in a teaching
> |situation -
> |
> |I'd say something like this:
> |
> |"What I mean by depth of field is maybe simpler to think of as depth of
> |focus, the area in your picture that is in focus. This is in a plane that
> |is perpendicular to your lens and parallel to the film. "
>
> What wrong with it is that it misdefines depth of focus  --- then you are
> going to have to explain why your definition is different than everyone
> else's.