Wow. That is pretty amazing. This explains the relative lack of noise in the final result. Thanks for the clarification. Great work, Chris. ----- Original Message ----- From: "Chris Schur" <comets133@xxxxxxxxx> To: <az-observing@xxxxxxxxxxxxx> Sent: Sunday, April 22, 2007 1:30 PM Subject: [AZ-Observing] Re: Polar Trails on a Dusty Night Hi Sam, yes, the 38 images were stacked in photoshop with "lighten" which combines all the images into a seamless set of arcs. Chris --- sam@xxxxxxxxxxx wrote: > Hi Chris - > > Very nice image. I am a little confused by the > exposure described as 38 x > 3m. Did you stack 30+ frames to get the seamless > star trails? > > Sam > Tucson > > <<< > http://www.schursastrophotography.com/xtiastro/polartrails042007.html > > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.