Hello to all: It is Crescent Nebula has 168 minutes with subs of 7 minutes, for 12 with filter Ha and 12 but with filter Oiii , soon I synthesized a photo but, in Photoshop, to create 3er. RGB channel, because with the filter Sii, there is no signal in this object. Thank you very much to happen to see the photo. Image: http://farm4.static.flickr.com/3558/...1bd5ba33_o.jpg Many greetingsCesar