|Object||Sh2-188 - emission nebula - It is really a very diffuse planetary nebula; you can see it as a full circle by an extreme image streching.|
|Telescope||Celestron C-8 203mm f3.0 90mm Guide telescope & QuickCam.|
|CCD||Starlight MX716 camera. Astronomik Ha & RGB filters.|
|Processing||Flats, Darks & Bias
aligning in AIPWin.
Sigma rejection combining with Ray Gralak's Sigma-Clip.
Deconvolution in AstroArt with Chris' Smart Star Bloat plug-in.
PhotoShop: L & R images blended at 80 - 20% for L & R channels.
L (50% opacity) and RGB layers, gaussian blur and color saturation.
Final image: LLRGB layers.
This image has appeared on Sky & Telescope Gallery (April/04)