SH2-133 (Sharpless 133 ) This object is fairly large so a good wide field of view will be needed here. The other item is speed because this is a faint nebula. With a wider field of view you can capture other nebula in the area including IC 1396 (SH2-131). The nebula does very well with the hydrogen-alpha filter which is a good thing because it is really hard to pick up anything with the wider band red filter and nothing at all with the green or blue. That said, the OIII filter is not of much use here. For a complete list of the Sharpless Catalog visit my main site at http://www.sharplesscatalog.com