van den Bergh 142 ( vdB142) Dark Nebula in Halpha

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Taken on June 23, 2006 from the Shingletown Star Party in Shingletown, Ca (~3000 ft MSL)

Stinger 450 Classical Cassegrain (18" f/12.6)

Lumicon Giant Easy Guider with Focal reducer for final: F= 3366mm, f/7.1

Finger Lakes CM10 MaxCam imaging camera operated at -26C

Robofocus

Finger Lakes CFW1 Filter wheel

SBIG ST7E guide camera

Custom Scientific 3nm FWHM Ha filter (50mm diameter)

Eight exposures of 30 minutes

Four hours total exposure time

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