This is a picture of the Bubble Nebula in Cassiopiea taken in the HST palette using narrow band filters, ie SII=Red Ha=Green and OIII=Blue. There are several other deep sky objects in the picture, see if you can name them
This was taken with a Starlight Xpress H36 ccd camera on a TMB 115 f7 APO on a Paramount ME using 10 minute unguided subframes