vdB142 Dark Nebula from Stinger 450 Classical Cassegrain

7 x 30 minutes (some with worse seeing)

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9 x 30 minutes (some with worse seeing)

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5 x 30 minutes (best five exposures, less than 2.7" stars)

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4 x 30 minutes (best four exposures, less than 2.7" stars)

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To see this area in tricolor narrowband, click here:    

                                                             Stinger 450 Classical Cassegrain (18" f/12.6) 

 

Taken on July 21 and 22, 2006 from my backyard in Castro Valley, California

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

Finger Lakes CM10 MaxCam imaging camera operated at -20C

Robofocus

Finger Lakes CFW1 Filter wheel

SBIG ST7E guide camera

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

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

Custom Scientific 3nm FWHM [OIII] filter (50mm diameter)

Seven exposures of 30 minutes in Halpha

Three and a half hours total exposure time

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