On Oct 14, 2011, at 14:04 , Matthew Hunt wrote: >> Don't you just wait for twice the exposure time for the final result? I >> haven't tried star trails. My longest K20D exposure has been something like >> 5 minutes. > > Star trails from DSLRs are usually assembled from multiple exposures > (otherwise you build up too much background from dark current and sky > brightness). So if the noise reduction makes you do 5 minutes on the > sky, then 5 minutes dark, then 5 sky, 5 dark, etc., you'll have > interruptions in your star trails, and the combined result will look > like dashed lines.
Don't we all still have "film" cameras? Joseph McAllister Pentaxian http://gallery.me.com/jomac -- 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.
