I added 4 hours and 40 minutes of OIII last night to my version of the California Nebula. I had 4 hours of Ha, all 20 minute exposures. I created this Bicolor version and will be adding more time to eventually come up with a Hubble version. Albert https://www.flickr.com/photos/49526053@N04/15436111534/ <https://www.flickr.com/photos/49526053@N04/15436111534/> -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.