Seagull Nebula using 3nm narrowband filters

Peter Nerbun
Location of photo
Perry Hall, Maryland USA
Date/Time of photo
March 19 2015 at 0218UT
TMB-92L refractor, Atik 460EX Monochrome CCD camera, Losmandy Gemini G-11 equatorial mount, Orion Mini 50mm Guide Scope, ASI 120MC guide camera, 3nm H-a and 3nm O-III narrowband filters, Aurora Flatfield Panel, Orion Nautilus motorized filter wheell
This image shows the Seagull Nebula (NGC 2327 and Sh2-236) using a 92mm refractor and a thermoelectrically cooled ATIK 460EX monochrome camera coupled to a filter wheel containing 3nm H-a and 3nm O-III narrowband filters. I recorded 15 minute subframes with each of the narrowband filters. Because of the seagull's large width I captured the left and right sides of the nebula separately and merged them together to form a mosaic.