Hi All- With the airglow discussions from a couple weeks ago, I posted some observations from the Grand Canyon at the 24th Grand Canyon Star Party earlier in the week (Tuesday night/Wednesday morning). It was a nice display, and for the first time, got some frames with my IR-modified Canon 20D (with RG720 filter) to capture OH emission in addition to the green visible glow from oxygen. Blog post is at: www.theketelsens.blogspot.com -Dean-- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.