Thanks Dan and David. I think this is probably more time than I've ever put on a single image. Eric I am not sure if significant difference means better or worse :) But I think Bernard is much more adept at image processing that I am. Actually I would love to give Bernard all this data and let him have a go at it. Having said that everything you mention would make a difference plus I added a significant amount of time using a Hydrogen Alpha filter as there is a lot of Ha in this galaxy. Albert -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.