On Wed, Jul 29, 2009 at 02:21:21PM -0600, William Robb scripsit: > As an aside, can a person do DFS after the fact by running a long > exposure with the cap on and then inverting it and dropping it onto a > long exposure picture?
You could, but the likelihood of the dark frame matching the thermal conditions of the shot are worse than if the dark frame is made and subtracted immediately after the shot is taken. -- Graydon -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
