NGC6820 Emission Nebula in Hydrogen Alpha Light

Click to enlarge. Click here for maximum resolution

Taken on July 14 & 15, 2004 from my backyard in Castro Valley, California

AP180EDT f/9 imaging scope used at F=1215 (f/6.75)

AP 0.75x photo/visual telecompressor

AP80/900mm guide scope

AP1200GTO mount

SBIG ST10XME  imaging camera @-26C

FLI CFW1 Filter wheel

FLI DF2 Digital Focuser

ST7E guide camera @ -22C

Custom Scientific Narrowband Emission Line Filter

   Hydrogen alpha        656.3nm  3nm FWHM 

12 exposures of 600 seconds for Ha

Total exposure time = 2 hours

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