Bruce Walker commented on facebook about how with medium format you get a particular transition from in focus to out of focus which finally made something click for me. Everybody talks about depth of field as if it is a sharp transition, but it isn't, and the same image could have different depths of field at different sizes and resolutions. How many photos look just fine as thumbnails/contact prints, but are out of focus, or mis-focused at a larger size/higher resolution? What I would love to see are graphs of the size of the circle of confusion, preferably a 3-d graph that would show it based both on focal length and distance. you could also show a slice at a particular pixel size which would give you the nominal depth of field. Does anyone know of someone having done graphs, or better yet a program where you can enter those values and see them change for yourself?
-- Larry Colen [email protected] -- 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.
