On Mon, Jun 6, 2011 at 9:08 AM, Anthony Farr <[email protected]> wrote:
> When you focus at any particular distance one third of the depth of > field (DOF) is between you and the focused distance, the other two > thirds is beyond the focused distance. Therefore when you focus at > infinity you squander two thirds of your DOF. That's an often-repeated statement, but it's not true. Or rather, it just happens to be true for some focus distances, but is not true in general. For example: If you focus at the hyperfocal distance, the DOF in front of the focused distance is finite, and the distance behind is infinite. So 0% (finite/infinite) is in front of the focused distance. At the other extreme, in macro photography, the DOF is split nearly equally front/back. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
