IC5146 Cocoon Nebula in Halpha and [SII]

Click image to enlarge, click here for highest resolution

Taken on September 24 - 25, 2005 from my backyard in Castro Valley, California

Astro-Physics AP180EDT f/9 imaging scope used at f/9 (F=1620mm)

Finger Lakes CM2-1 imaging camera operated at -20C

Robofocus

Finger Lakes CFW7 Filter wheel

Astro-Physics 80/900mm guidescope

SBIG ST7E guide camera

Custom Scientific 3nm Ha filter (50mm unmounted)

Custom Scientific 3nm [SII] filter (50mm unmounted)

six exposures of 20 minutes for Halpha

six exposures of 20 minutes for [SII]

four hours total exposure time

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