Sharpless 2-155 Emission Nebula in Halpha

17 x 20minutes exposure

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11 x 20minutes exposure

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  6 x 20minutes exposure

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3 x 20minutes exposure

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Taken on November 20 - 25, 2005 from my backyard in Castro Valley, California

AP180EDT f/9 imaging scope used at f/6.75

AP 0.75x Telecompressor

FLI IMG6303E imaging camera @ -26C

AP80/900mm guidescope

SBIG ST7E guide camera

FLI CFW7 color filter wheel

6nm FWHM AstroDon Ha 50mm AR-Coated filter

17 exposures of 20 minutes through Ha filter

5 hours  40 minutes total exposure time

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