I've been working on M27 for over a week. I have been able to get 6 hours of Ha and 5 hours of OIII, all 1200 second exposures using my Edge 8 and SX H16 with an OAG. Bill Snyder got an APOD for his and it's seriously amazing. If anyone is interested here is a link to his page. http://billsnyderastrophotography.com/?page_id67 I did two versions of this. One using a technique Snyder showed me in Photoshop and another using PixInsight. Here are both. Having looked at Snyder's for 10 days I actually don't like these but he was using a 17inch Planewave in the Sierra Nevada mountains. I guess if you don't look at his images mine look ok :) Here are links to the two versions I processed. Albert http://www.flickr.com/photos/49526053@N04/9155025114/in/photostream/ http://www.flickr.com/photos/49526053@N04/9155025072/ -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.