SH2-122 (Sharpless 122 ) Near the bright star Markab in Pegasus SH-122 sits in a rich area of small galaxies. This object does not pick up anything with narrowband filters including hydrogen-alpha so you standard LRGB filters work well here. A clear filter is best because it picks up the most detail but you could get reflection off Markab so if you have a wide enough field of view it is best to include the star in your image. The color filters also pick up the same amount of nebula so there is not much color variation here. The blue and red filters do have an edge over the green just a bit thus the color seen here. I suspect you will pick up more of the dust cloud, which this appears to be, using a wider field but the best part is seen here For a complete list of the Sharpless Catalog visit my main site at http://www.sharplesscatalog.com